US2783666A - Pilger mill apparatus - Google Patents

Pilger mill apparatus Download PDF

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Publication number
US2783666A
US2783666A US376541A US37654153A US2783666A US 2783666 A US2783666 A US 2783666A US 376541 A US376541 A US 376541A US 37654153 A US37654153 A US 37654153A US 2783666 A US2783666 A US 2783666A
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United States
Prior art keywords
mandrel
carriage
piston
pilger mill
mill apparatus
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
US376541A
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English (en)
Inventor
Mclay Gavin Smellie
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.)
Stewarts and Lloyds Ltd
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Stewarts and Lloyds Ltd
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Filing date
Publication date
Application filed by Stewarts and Lloyds Ltd filed Critical Stewarts and Lloyds Ltd
Application granted granted Critical
Publication of US2783666A publication Critical patent/US2783666A/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
    • B21B21/04—Pilgrim-step feeding mechanisms

Definitions

  • This invention relates to pilger mill apparatus for the manufacture of seamless metal tubes, and is concerned with apparatus of the kind (hereinafter referred to as the kind described), comprising peripherally grooved and gapped rolls, means for driving such rolls, a mandrel on which a tube blank can be placed and by which it is passed between the grooved and gapped rolls, a carriage movable forward and backward with respect to the rolls, resilient means mounted on the carriage and operative to absorb backward thrust set up by the rolls on the mandrel during the rolling of the blank and to move the mandrel and blank forward with respect to the carriage when the gap in the rolls reaches the blank and releases the mandrel, and driving means to feed the carriage forward during the rolling of the blank and to return the carriage on the completion of the rolling of the blank.
  • the resilient means generally has a mandrel head attached to it for the connection of the mandrel thereto and usually the connecting means employed comprises a locking plate operated by a quick-acting hand-lever fulcrummed on the mandrel head.
  • a pilger mill apparatus of the kind described, mechanism to connect the mandrel to the resilient means, or to a mandrel head connected to such resilient means, such mechanism comprising a member slidable in a hollow part of the resilient means or in a hollow of the mandrel head, the said member being operative to engage a hole in the mandrel and means being provided to move the member into and out of engagement with said hole.
  • the member operative to engage the hole in the mandrel is rigidly connected, as by a rod, to a block slidable in a hollow part of the resilient means.
  • the means to effect disengagement of the member from the hole in the mandrel suitably comprises a pin or bar extending from the block through slots in the wall of the hollow part of the resilient means, one or more pivotal arms or levers disposed adjacent to and operative directly or indirectly on the pin or bar, and means to move such one or more arms or levers.
  • Figure 1 is a sectional elevation of a pilger mill apparatus of the kind described embodying one form of 2,783,666 Patented -Mar. 5, 1957 mechanism to connect the mandrel to the resilient means in accordance with the present improvements.
  • Figure 2 is a sectional view of that part of Figure 1 more nearly associated with this invention, the view being on a larger scale than Figure 1.
  • Figure 3 is a fragmentary elevation illustrating a modification
  • FIG. 4 is a similar view depicting another modification
  • Figure 5 is a fragmental sectional elevation showing a further modification
  • Figure 6 is a sectional view of and taken at rightangles to Figure 5 looking on the latter from the left, this view being on a larger scale than Figure 5.
  • the pilger mill apparatus shown in Figure 1 comprises a sole plate 1 to be fixed to the ground and a carriage 2 mounted to slide on the upper surface of the sole plate 1.
  • the carriage 2 is formed with a horizontal air cylinder 3 within which moves a piston 4 having at its forward end an extension of which the portion 5 adjacent the piston has a series of helical grooves cut in its surface which engage with helical grooves cut on.
  • the portion 9 of the extension of the piston 1 beyond the helically grooved portion 5 extends through a container 10 for liquid, such as water, and has a conical shoulder 11 which is adapted to enter an aperture or space 12 having its inner end similarly conically shaped at 13.
  • the diameter of the space 12 is slightly larger than the portion 9 of the piston extension and its wall preferably converges slightly towards its inner end.
  • the container 10 forms part of the carriage 2, being in an extension from the wall of the cylinder 3.
  • the portion 9 of the piston extension and the space 12 constitute a dashpot to cushion the forward movement of the piston 4 under the action of the resilient means presently referred to, the liquid being forced out of the space 12 between its wall and the periphery of the extension as the latter moves into it.
  • a pressure-relief valve 14 controls an outlet from the inner end of the space 12 to'
  • the extension of the piston 4' is continued as a hollow portion 15 (cf. Figure 2) in which is slidably mounted a cylindrical block 16 having a transverse pin 17 therethrough which extends through oppositely disposed slots 18 in the wall of this extension portion 15.
  • This pin 17 is engaged, in the manner of a bayonet-type fastening, with a plate like member 19 which is mounted to slide on the part 15.
  • the cylindrical block 16 is fixed on one end of a rod 20 whose opposite end carries a cylindrical member 21 supported in a bushing 22 in a central hollow 230 of a mandrel head 23.
  • the rod 20 passes through and is supported by aguide 24 which is fixed by bolts 25 to and between the mandrel head 23 and piston extension portion 15 and is slidable on the carriage 2.
  • the mandrel head I; 23 has an upwardly directed slot 29 through which the mandrel can be removed, since the mandrel end is so shaped and forms with the mandrel head such a connection that there can be no endwise movement of the mandrel away from the mandrel head.
  • a lever 30 fulcrumed at 31 on the carriage 2 has one arm with its end 32 disposed beside the piston extension 15 and adjacent the plate-like member 19.
  • the other arm of the lever 30 carries a roller 33 at its end.
  • An abutment 34 having a sloping upper face to be engaged by the roller 33 is fixed on the sole plate or bed 1 of the apparatus.
  • Opposed hydraulic cylinders 35, 36 are mounted on pillars 37 extending upwards from the sole plate 1 or the ground and the ends of their pistons engage abutments.33 on the carriage 2, the piston 39 of the cylinder 35, usually termed the feed cylinder, acting to move the carriage 2 and with it the mandrel 28 towards the peripherally grooved. and gapped pilger rolls 40 and the piston 41 of the other cylinder 36, usually termed the- 41.and' cylinder 36 are operated to retract the carriage 2, Being thus held stationary, the block. strips the completed tube from the mandrel as the latter is drawnbaclc with. the carriage. During the rolling operations, the
  • stripper block is released from the. means for holding it stationary at the end of the rolling operations; and it moves with the mandrel. 28 as the latter moves back and forth.
  • the stripper block would be removed with the mandrel and a fresh one used on the next mandrel, but this is not essential.
  • the stripper cylinder 36 and piston 41 are operated whereby the tube is removed from the-mandrel by the stripper block 43, the mandrel being locked to the mandrel head.
  • the-roller 33 on one end of the lever 30 engages the abutment 34 whereby the lever is moved about the-pivot-31. to cause.
  • the cylindrical member21 may be operated by a pneu matic or hydraulic cylinder and piston, an electric solenoid or ahandlever.
  • a pneu matic or hydraulic cylinder and piston an electric solenoid or ahandlever.
  • the cylindrical member21 may be operated by a pneu matic or hydraulic cylinder and piston, an electric solenoid or ahandlever.
  • an arm 32a operative onthe platelike member 19 and pivotally mounted at 31a is operated piston combination.
  • 44 'could of. course, be substituted by an electric solenoid and plunger as will be understood without. further illustration.
  • the modification depicted in Figure 4 comprises a hand-lever 46 fixed to the pivot 31a of the arm 32a which, as in Figure 3, is pivstauy' mounted on the carriage 2.
  • the cylindrical member 21 (not shown in these figures), is operated by levers through a bar 47 extending through and fixed in the block 16 and passing through slots 18b in the piston extension portion 15.
  • the levers are fulcrurned at 31b and cooperate with abutmcnts such as 341) on the sole plate of bed 1 of the apparatus.
  • This modification dispenses' with the plate-like member 19 aforesaid and thus results in some saving of reciprocating weight.
  • the arrangement would be such that the bar 47 would be opposite and its ends adjacent to the operating lev'e'r's' 305, immediately prior to the rollers 336 on these levers contacting the abutments 34b.
  • the part marked 48 is a stop for limiting the forward position of the piston of the resilient means relative to the carriage 2. It is adjustable in length by helical parts, for purposes which will be understood, and49, 50 indicate screw and nut adjusting means respectively which could be used in making the adjustment.
  • Pilger mill apparatus comprising a set of pilgerrolls
  • first element embodying a mandrel head to be engaged with a mandrel, a mandrel engaging member mounted slidably in a hollow in said mandrel head, such member being engageable with the mandrel by the end of one entering a hole in the other on forward slidable movement of said member, a block slidable in a hollow bore of said first element and rigidly connected to said-mandrel engaging member, a transverse member extended from said block through slots in said first element, a pivotal arm disposed adjacent to and operative to'rnove said transverse member along said slots, and means operative to move such arm on the retraction of the carriage in the direction away from the rolls whereby the
  • Apparatus according to claim 1, wherein the means operative to move the pivotal arm comprise'san abutment disposed in a fixed position on the apparatus.
  • Apparatus-according to claim 1 comprising a guide embodied inthe first element between the mandrel head and-the slots in said first element, said guide being slidable on the carriage, and a rod extending in the hollow bore of said first element and through a central aperture of said guide and rigidly connecting the mandrel-engagingmember with the block.
  • Apparatus according to claim 3 comprising a coil spring encircling the rod and acting between the guide and the mandrel-engaging member to move said member into engagement with the mandrel.
  • a mandrel having a hole in its rear end operative for reception of the mandrel-engaging member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Of Metal (AREA)
  • Metal Extraction Processes (AREA)
US376541A 1952-09-09 1953-08-26 Pilger mill apparatus Expired - Lifetime US2783666A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22636/52A GB737186A (en) 1952-09-09 1952-09-09 Improvements in or relating to pilger mill apparatus for the manufacture of seamlessmetal tubes

Publications (1)

Publication Number Publication Date
US2783666A true US2783666A (en) 1957-03-05

Family

ID=10182639

Family Applications (1)

Application Number Title Priority Date Filing Date
US376541A Expired - Lifetime US2783666A (en) 1952-09-09 1953-08-26 Pilger mill apparatus

Country Status (7)

Country Link
US (1) US2783666A (xx)
BE (1) BE522522A (xx)
DE (1) DE955852C (xx)
ES (1) ES211182A1 (xx)
FR (1) FR1088363A (xx)
GB (1) GB737186A (xx)
NL (1) NL89051C (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037453A (en) * 1976-05-04 1977-07-26 Aetna-Standard Engineering Company Shellpusher for plug mill or the like
US4100786A (en) * 1976-04-22 1978-07-18 Mannesmann Aktiengesellschaft Feed mechanism for pilger rolling mills
US4145906A (en) * 1978-02-21 1979-03-27 Proizvodstvennoe Obiedinenie "Elektrostaltyazhmash" Feeding device of a tube cold-rolling mill
US4311032A (en) * 1979-02-07 1982-01-19 Innocenti Santeustacchio S.P.A. Method and apparatus for rolling seamless tubes with a restrained mandrel
EP0348595A2 (en) * 1988-06-30 1990-01-03 INNSE INNOCENTI ENGINEERING S.p.A. A spindle for pilgrim-process rolling mill

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US683801A (en) * 1901-07-08 1901-10-01 British Mannesmann Tube Co Ltd Apparatus for step-rolling tubes.
DE478270C (de) * 1928-07-24 1929-06-22 Fritz Osenberg Einrichtung zum Auswechseln der Pilgerdorne bei Pilgerschrittwalzwerken
US1936475A (en) * 1929-08-22 1933-11-21 Fritsch Hermann Feeding device for pilger rolling mills

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE433518C (de) * 1925-09-09 1926-09-01 Bochumer Ver Fuer Bergbau Dornschloss fuer Rohrwalzwerke
DE614700C (de) * 1933-07-23 1935-06-15 Demag Akt Ges Verriegelung des Dornstangenwiderlagers bei Rohrwalzwerken
DE877285C (de) * 1941-01-25 1953-05-21 Westdeutsche Mannesmannroehren Dornschloss fuer Pilgerschrittwalzwerke
DE854191C (de) * 1944-11-24 1952-10-30 Westdeutsche Mannesmannroehren Dornschloss fuer Pilgerschrittwalzwerke, bei dem die Verriegelung und die Freigabe des Pilgerdornes selbsttaetig mit Hilfe von Sperrgliedern erfolgt

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US683801A (en) * 1901-07-08 1901-10-01 British Mannesmann Tube Co Ltd Apparatus for step-rolling tubes.
DE478270C (de) * 1928-07-24 1929-06-22 Fritz Osenberg Einrichtung zum Auswechseln der Pilgerdorne bei Pilgerschrittwalzwerken
US1936475A (en) * 1929-08-22 1933-11-21 Fritsch Hermann Feeding device for pilger rolling mills

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100786A (en) * 1976-04-22 1978-07-18 Mannesmann Aktiengesellschaft Feed mechanism for pilger rolling mills
US4037453A (en) * 1976-05-04 1977-07-26 Aetna-Standard Engineering Company Shellpusher for plug mill or the like
DE2716298A1 (de) * 1976-05-04 1977-11-17 Aetna Standard Eng Co Huellenglied-stosseinrichtung fuer ein stopfenwalzenwerk und verfahren zum betreiben derselben
US4145906A (en) * 1978-02-21 1979-03-27 Proizvodstvennoe Obiedinenie "Elektrostaltyazhmash" Feeding device of a tube cold-rolling mill
US4311032A (en) * 1979-02-07 1982-01-19 Innocenti Santeustacchio S.P.A. Method and apparatus for rolling seamless tubes with a restrained mandrel
EP0348595A2 (en) * 1988-06-30 1990-01-03 INNSE INNOCENTI ENGINEERING S.p.A. A spindle for pilgrim-process rolling mill
EP0348595A3 (en) * 1988-06-30 1991-09-25 INNSE INNOCENTI ENGINEERING S.p.A. A spindle for pilgrim-process rolling mill

Also Published As

Publication number Publication date
NL89051C (xx)
BE522522A (xx)
FR1088363A (fr) 1955-03-07
ES211182A1 (es) 1954-01-01
DE955852C (de) 1957-01-10
GB737186A (en) 1955-09-21

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