US3638466A - Recoil device for a rotary forging mill - Google Patents

Recoil device for a rotary forging mill Download PDF

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Publication number
US3638466A
US3638466A US834832A US3638466DA US3638466A US 3638466 A US3638466 A US 3638466A US 834832 A US834832 A US 834832A US 3638466D A US3638466D A US 3638466DA US 3638466 A US3638466 A US 3638466A
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US
United States
Prior art keywords
recoil
piston
space
cylinder
gas
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
US834832A
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English (en)
Inventor
Jean-Paul Calmes
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Individual
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Individual
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Publication date
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Publication of US3638466A publication Critical patent/US3638466A/en
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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

  • a rotary forging mill also called a pilger mill
  • a rotary forging mill which device essentially has a recoil cylinder, a recoil piston with a mandrel and a device for braking'the forward movement of the, piston; a cylinder space behindthe piston contains gas, for-instance air,.for storing the energy for the forward stroke of the piston.
  • the braking device may be in the form ofa cone containing liquid, and the recoil device may include a mechanism for turning themandrel.
  • This invention also relates to a device for carrying out the method.
  • a recoil device for a rotary forging mill having a recoil cylinder
  • the earlier recoil device of FIGS. -1 and 2 has arecoil piston 1 and a recoil cylinder 2.
  • the :rear space 3 of the recoil cylinder 2 is closed by an end closure'4 which is carried by a threaded spindle 5.
  • the cubic capacity of the rear space 3 canbe altered by adjusting the end closure 4 whose threaded spindle 5 can turn in a nut 6 carried by a cylinder end cover 7.
  • FIG. 3 is a graph of the compression curve for the recoil air in the rear space 3.
  • the initial pressure of the air in the rear space 3 is indicated as P,,.
  • the initial pressure of the recoil air in the rear space 10 of the recoil cylinder 9 is indicated as P
  • the compression curve AB rises more steeply than the compression curve shown in FIG. 3 and after a considerably shorter movement of the recoil piston 8, reaches a permitted limiting pressure P, because the rear space 10 is made smaller by the position of the movable piston closure 11 shown in FIG. 4.
  • P the compression curve AB
  • the adjustable limiting pressure P which is determined by the pressure in the air container 13 and the pressure in the space 12
  • the piston closure 11 moves rearwards at the same speed as the recoil piston 8 because, as a result of the large air container l3, practically no further compression occurs i'n'the space 12.
  • This part of the working stroke is shown by the curve BC, which here indicates a slight increases in pressure in the rear cylinder space 10 of the recoil cylinder 9 because the air container 13 is not infinitely large.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Forging (AREA)
  • Power Steering Mechanism (AREA)
US834832A 1968-06-20 1969-06-19 Recoil device for a rotary forging mill Expired - Lifetime US3638466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681752603 DE1752603A1 (de) 1968-06-20 1968-06-20 Verfahren zum Betreiben einer Vorholvorrichtung zur Herstellung von nahtlosen Rohren auf einem Pilgerschrittwalzwerk und Vorrichtung zur Durchfuehrung des Verfahrens

Publications (1)

Publication Number Publication Date
US3638466A true US3638466A (en) 1972-02-01

Family

ID=5692867

Family Applications (1)

Application Number Title Priority Date Filing Date
US834832A Expired - Lifetime US3638466A (en) 1968-06-20 1969-06-19 Recoil device for a rotary forging mill

Country Status (9)

Country Link
US (1) US3638466A (cs)
CS (1) CS152325B2 (cs)
DE (1) DE1752603A1 (cs)
ES (1) ES368543A1 (cs)
FR (1) FR2011531A1 (cs)
GB (1) GB1215429A (cs)
HU (1) HU158063A (cs)
PL (2) PL69655B1 (cs)
YU (1) YU32017B (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102873111A (zh) * 2012-09-27 2013-01-16 太原重工股份有限公司 热皮尔格轧管机的喂送系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2360759A1 (de) * 1973-12-06 1975-06-12 Diosgyoeri Gepgyar Vorschubeinrichtung vornehmlich fuer drehschmiedewalzwerke zur herstellung nahtloser rohre
IT1076252B (it) * 1977-03-29 1985-04-27 Sardelli Bruno Cassa di alimentazione per laminatoi a passo di pellegrino per tubi senza saldatura
IT1095518B (it) * 1978-05-24 1985-08-10 Sardelli Bruno Dispositivo di regolazione della cassa di alimentazione per laminatoi a passo di pellegrino per tubi senza saldatura
DE3019383C2 (de) * 1980-05-19 1985-03-07 Mannesmann AG, 4000 Düsseldorf Steuerung eines pneumatisch angetriebenen Vorholers in einer Pilgerwalzanlage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088134A (en) * 1933-05-31 1937-07-27 Haessler Paul Die-casting and pressure molding machine
US2775150A (en) * 1952-03-07 1956-12-25 Stewarts & Lloyds Ltd Pilger mill apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088134A (en) * 1933-05-31 1937-07-27 Haessler Paul Die-casting and pressure molding machine
US2775150A (en) * 1952-03-07 1956-12-25 Stewarts & Lloyds Ltd Pilger mill apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102873111A (zh) * 2012-09-27 2013-01-16 太原重工股份有限公司 热皮尔格轧管机的喂送系统
CN102873111B (zh) * 2012-09-27 2014-09-03 太原重工股份有限公司 热皮尔格轧管机的喂送系统

Also Published As

Publication number Publication date
GB1215429A (en) 1970-12-09
PL69655B1 (cs) 1973-08-31
YU154269A (en) 1973-08-31
YU32017B (en) 1974-02-28
FR2011531A1 (cs) 1970-03-06
ES368543A1 (es) 1971-05-01
PL69750B1 (cs) 1973-08-31
DE1752603A1 (de) 1970-03-05
CS152325B2 (cs) 1973-12-19
HU158063A (cs)

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