US2032277A - Braking device for feeding means of pilgering mills - Google Patents

Braking device for feeding means of pilgering mills Download PDF

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Publication number
US2032277A
US2032277A US737726A US73772634A US2032277A US 2032277 A US2032277 A US 2032277A US 737726 A US737726 A US 737726A US 73772634 A US73772634 A US 73772634A US 2032277 A US2032277 A US 2032277A
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US
United States
Prior art keywords
feeding means
pilgering
mills
braking device
braking
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
US737726A
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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
Application granted granted Critical
Publication of US2032277A publication Critical patent/US2032277A/en
Anticipated expiration legal-status Critical
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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

Definitions

  • My invention relates to braking devices for feeding means of pilgering mills.
  • a tube blank carried on a mandrel is fed rapidly forward to the pilgering rolls after each revolution of the rolls.
  • braking devices are usually associated with said feeding means.
  • a braking device suitable for that purpose is for instance disclosed in Patent 1,833,990 to Hans Dreyer in which a liquid is compressed on each forward stroke of the feeding means which liquid in its turn compresses a mass of air enclosed in a vessel. The compression of the enclosed air results in braking the feeding means and the parts moving together with it.
  • a further drawback of known braking devices is that, in the course of their operation, the air is highly heated by its continual compression. Since the pressure of the air is also influenced by its temperature, it is obvious, that the braking effect exerted on the feeding means will vary with the number of strokes. A uniform braking effect is, however, very desirable.
  • I are the rolls of a pilgering mill of known shape which work on a tube blank 2 carried by a mandrel 3.
  • the latter is rigidly connected by a coupling box I3 to feeding means which comprise a rod 4 and a piston 5 adapted to reciprocate in a cylinder 6.
  • feeding means which comprise a rod 4 and a piston 5 adapted to reciprocate in a cylinder 6.
  • the latter is filled with a fluid under pressure which drives the piston 5 and the parts connected thereto forward towards the pilgering rolls I when the latter are not working the blank 2 and pushing it back against the pressure of the fluid.
  • Cylinder 6 is supported by a bed plate 9 which also carries a second cylinder 1 forming a part of the braking device.
  • Rod 4 extends through the cylinder I and has a shoulder I4 which acts as a plunger on a suitable liquid I5 contained in cylinder I when the rod 4 is reciprocated.
  • An abutment ring 8 for the plunger I4 is provided at the outer end of cylinder I. Attached to cylinder 1, and projecting above it, is an air vessel I6 in free communication with the cylinder I.
  • vessel I6 is of cylindrical shape formed with an upwardly tapered portion.
  • the plunger I4 advances on its forward stroke when the tube blank 2 is fed to the pilgering rolls I, the liquid I5 is forced more and more into the vessel I6 thereby compressing the air enclosed in that vessel which brings about a braking effect on plunger I4 and the feeding means. Because of the preferred form of the vessel I6, that compression is much more intense at the end of the feeding stroke than at its beginning so that all the required braking effect can be obtained during the last part of the feeding stroke, while the speed of the feeding means during the first part is left substantially unimpaired.
  • a shut-off valve I2 is provided at the upper end of vessel I6 for the liquid I5 to be introduced or withdrawn.
  • the vessel I6 is provided with a cooling means by which the heat developed in the air is absorbed so that its temperature will be maintained even throughout the whole time of operation.
  • I surround vessel IS with a jacket I0 filled with a cooling medium I I which may be water, oil, gas or simply air. The medium is admitted and discharged at different levels by pipes shown in the drawing.
  • a braking device for the feeding means of pilgering mills the combination with a cylinder filled with a liquid and a braking plunger adapted to reciprocate in said cylinder and operatively connected with the feeding means, of a closed air-filled vessel in direct communication with said cylinder having a constricted upper portion so disposed as to offer a rapidly increasing powerful resistance to the liquid displaced 5 2032,27? 7' 7 by said plunger toward the end of the feeding operatirely connected with said feeding means'mf stroke.
  • 1 I Z r V n a closed air-filled vessel in direct communication 7 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Metal Rolling (AREA)
US737726A 1933-08-03 1934-07-31 Braking device for feeding means of pilgering mills Expired - Lifetime US2032277A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21806/33A GB409952A (en) 1933-08-03 1933-08-03 Improvements in or relating to work-advancing means for pilgering mills

Publications (1)

Publication Number Publication Date
US2032277A true US2032277A (en) 1936-02-25

Family

ID=10169130

Family Applications (1)

Application Number Title Priority Date Filing Date
US737726A Expired - Lifetime US2032277A (en) 1933-08-03 1934-07-31 Braking device for feeding means of pilgering mills

Country Status (5)

Country Link
US (1) US2032277A (enrdf_load_stackoverflow)
BE (1) BE404357A (enrdf_load_stackoverflow)
DE (1) DE615317C (enrdf_load_stackoverflow)
FR (1) FR775790A (enrdf_load_stackoverflow)
GB (1) GB409952A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814962A (en) * 1953-02-27 1957-12-03 Wellman Smith Owen Eng Co Ltd Manufacture of seamless metal tubes
CN101773934B (zh) * 2009-12-22 2012-05-02 太原重工股份有限公司 一种顶杆止推小车的制动装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3530343A1 (de) * 1985-08-24 1987-02-26 Kocks Technik Verfahren zum hohlwalzen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814962A (en) * 1953-02-27 1957-12-03 Wellman Smith Owen Eng Co Ltd Manufacture of seamless metal tubes
CN101773934B (zh) * 2009-12-22 2012-05-02 太原重工股份有限公司 一种顶杆止推小车的制动装置

Also Published As

Publication number Publication date
FR775790A (fr) 1935-01-09
BE404357A (enrdf_load_stackoverflow)
GB409952A (en) 1934-05-10
DE615317C (de) 1935-07-02

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