US2021686A - Feeding mechanism for pilgering mills - Google Patents

Feeding mechanism for pilgering mills Download PDF

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Publication number
US2021686A
US2021686A US737727A US73772734A US2021686A US 2021686 A US2021686 A US 2021686A US 737727 A US737727 A US 737727A US 73772734 A US73772734 A US 73772734A US 2021686 A US2021686 A US 2021686A
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United States
Prior art keywords
pilgering
mandrel
feeding mechanism
mills
rolls
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 - Lifetime
Application number
US737727A
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English (en)
Inventor
Gassen Josef
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.)
Schloemann AG
Original Assignee
Schloemann AG
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 Schloemann AG filed Critical Schloemann AG
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Publication of US2021686A publication Critical patent/US2021686A/en
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    • 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

Definitions

  • My invention relates to feeding mechanisms of pilgering mills.
  • I provide separate driving means for effecting the rotation of the spindle which are automatically started at a certain position of the pilgering rolls and stopped after a rotation of the mandrel about the desired angle.
  • a further drawback of the known feeding mechanisms of pilgering mills was that a stop had to be provided for limiting their travel. This stop was subjected to continual wear and therefore did not ensure an invariable length of feed. Furthermore the stop had to be adjusted or exchanged when the diameter or the feed of the tube blank was varied which was, however, sometimes very diflicult in view of the high temperature in the neighborhood of the rolls where the stop was located.
  • FIG. 1 and 2 are sections through a feeding mechanism for pilgering mills embodying the invention, Fig. 2 being a continuation of Fig. i. Fig. 3 is a transverse section on line III-III of Fig. l.
  • I are pilgering rolls adapted to operate on a tube blank 2 which is carried by a mandrel 3;.
  • the latter is connected by a coupling box 28 to rod 4 of the feeding mechanism which terminates in a piston H which is under the constant load of compressed air or another suitable propelling agent.
  • the drawing shows that moment of operation at which a part of tube blank 2 has been elongated to the finished tube 23.
  • the pilger rolls I have pushed back thereby the tube blank 2 tgether with the feeding mechanism against the pressure of the compressed air on piston 2i.
  • On further rotation of the rolls I they disengage the tube blank, because of the shape of their pass, so that the blank will be fed forward toward the rolls I by the constant load of compressed air on piston 29.
  • the feeding mechanism is rotated about 90 together with the mandrel and the tube blank 2, in order to eliminate the seam caused by the roll gap at the preceding stroke of the pilger rolls.
  • a square spindle 5 so that it can reciprocate, but not rotate relative to hub 22 and rod 4.
  • a ratchet wheel 6 On a cylindrical extension of spindle 5 is mounted a ratchet wheel 6 which is engaged by a pawl 8 mounted on a lever I (Fig. 3). The latter is rocked forwards and backwards through link 9 by crank I0, independently of the reciprocation of the feeding mechanism.
  • crank I0 crank I0, independently of the reciprocation of the feeding mechanism.
  • the pawl 8 takes the ratchet wheel 6 with it, but slides idly over it during the backward movement so that it remains then in its position together with spindle 5.
  • Crank H1 is rigidly mounted on shaft II, riven by means of spur gears I2 and I3 by a motor I4 flanged to casing 21.
  • I In order that motor I4 be started anew with every revolution of the pilger rolls I, I provide a control disc 24 on one roll shaft, here not shown, said disc having a cam 25 which operates a starter switch 26. I provide further a control disc I5 on shaft I I which disc operatesa second switch I6 for stopping motor I4, after spindle 5 and mandrel 3 have been rotated about the desired angle of 90. The speed of the motor will be so selected that even with the shortest feed available on the mill the rotation of the mandrel will not take too much time.
  • Control discs l5 and 24 are both adjustably mounted on their respective shafts so that the starting and stopping of the motor can be timed at will. It will be further clear from the foregoing that my invention is not limited to any specific angle of rotation, but that any desired angle can be controlled with it.
  • a control disc 30 having a cam 31 is driven by pilger rolls l, forinstance by a chain or any other suitable means.
  • operates a switch 32 for starting the motor.
  • the control disc 30 is rotated relative to rolls I in the ratio 1:2 so that the carrier I9 will be fed to the rolls I only after each second revolution. It will be obvious, however, that by suitably selecting the transmission gear between rolls I and control disc 30, or by even mounting disc 30 directly on one of the shafts of rolls I, any des red feed control can be obtained.
  • a second control disc 34 is provided which is driven from spindle I? for operating switch 33 which stops the motor. Control disc 34 may be driven from spindle ll by a transmission gear which is continuously variable so that any desired feed may be obtained.
  • feeding mechanism for pilgering mills the combination with a mandrel for carrying a tube blank and means for imparting a linear motion to said mandrel, of means for rotating said mandrel about a predetermined angle independently of said linear motion, and separate means mandrel about a predetermined angle independently of said linear motion, and separate means for starting and stopping said rotation, said starting means being operatively associated with and adjustable relative to the rolls of the mill and said stopping means being operatively associated with and adjustable relative to a member of said rotating means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Forging (AREA)
  • Control Of Metal Rolling (AREA)
  • Paper (AREA)
US737727A 1933-08-03 1934-07-31 Feeding mechanism for pilgering mills Expired - Lifetime US2021686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21807/33A GB406205A (en) 1933-08-03 1933-08-03 Improvements in or relating to work-advancing means for pilgering mills

Publications (1)

Publication Number Publication Date
US2021686A true US2021686A (en) 1935-11-19

Family

ID=10169145

Family Applications (1)

Application Number Title Priority Date Filing Date
US737727A Expired - Lifetime US2021686A (en) 1933-08-03 1934-07-31 Feeding mechanism for pilgering mills

Country Status (5)

Country Link
US (1) US2021686A (enrdf_load_stackoverflow)
BE (1) BE404356A (enrdf_load_stackoverflow)
DE (1) DE639991C (enrdf_load_stackoverflow)
FR (1) FR775791A (enrdf_load_stackoverflow)
GB (1) GB406205A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578321A (en) * 1948-02-18 1951-12-11 Beaver Pipe Tools Inc Pipe rest
US2593772A (en) * 1942-12-16 1952-04-22 See Fabriks Aktiebolag Mandrel position adjustment means for pilgrim rolling mills
US2780118A (en) * 1953-02-05 1957-02-05 United States Steel Corp Apparatus for rolling tubes
US2905033A (en) * 1955-04-06 1959-09-22 Grob Benjamin Groove rolling machine
US3344644A (en) * 1963-09-30 1967-10-03 Mannesmann Meer Ag Pilger rolling mills

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE929842C (de) * 1948-10-01 1955-07-04 Mannesmann Ag Werkstueckvorholvorrichtung fuer Pilgerschrittwalzwerke
DE1142485B (de) * 1956-07-23 1963-01-17 Kocks Gmbh Friedrich Getriebe zur Erzeugung periodischer Drehbewegungen
US3460421A (en) * 1966-09-01 1969-08-12 Alexander Borzym Power drive for machine elements

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593772A (en) * 1942-12-16 1952-04-22 See Fabriks Aktiebolag Mandrel position adjustment means for pilgrim rolling mills
US2578321A (en) * 1948-02-18 1951-12-11 Beaver Pipe Tools Inc Pipe rest
US2780118A (en) * 1953-02-05 1957-02-05 United States Steel Corp Apparatus for rolling tubes
US2905033A (en) * 1955-04-06 1959-09-22 Grob Benjamin Groove rolling machine
US3344644A (en) * 1963-09-30 1967-10-03 Mannesmann Meer Ag Pilger rolling mills

Also Published As

Publication number Publication date
BE404356A (enrdf_load_stackoverflow)
GB406205A (en) 1934-02-22
DE639991C (de) 1936-12-17
FR775791A (fr) 1935-01-09

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