US3659446A - Method and device for feeding of cold pilger mills - Google Patents

Method and device for feeding of cold pilger mills Download PDF

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Publication number
US3659446A
US3659446A US82739A US3659446DA US3659446A US 3659446 A US3659446 A US 3659446A US 82739 A US82739 A US 82739A US 3659446D A US3659446D A US 3659446DA US 3659446 A US3659446 A US 3659446A
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Prior art keywords
shell
feed carriage
dies
pilger
length
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Expired - Lifetime
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US82739A
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English (en)
Inventor
Josef Gerretz
Willi Hagedorn
Karl-Heinz Kemmerling
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WEAN IND Inc
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WEAN IND Inc
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Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEAN UNITED, INC., A CORP.OF OH
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEAN UNITED, INC., A CORP. OH.
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). RECORDED ON REEL 4792 Assignors: WEAN UNITED INC./NOW WEAN INCORPORATED PA CORP.
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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
    • B21B21/045—Pilgrim-step feeding mechanisms for reciprocating stands

Definitions

  • the entry pusher of the mill starts moving the length of newly fed shell is measured and this measurement is transmitted to a memory counter, and by means of a program control the distance travelled by the feed carriage is regulated to the length of the newly fed shell, whereby the feed carriage moves only far enough so that on its return to a starting position a space is left which is equal to the length of the newly fed shell.
  • the invention comprises the measurement of a shell as it is moved forwardly by a pusher device, transmitting the measurement to a memory counter having a nulling device, and by means of a program controller regulating the feeding movement of a feed carriage to the length of the new shell, so that the latter will closely fit within the space between the feed carriage and the end of the shell already being worked in the pilger dies.
  • FIG. 1 shows the feeding mechanism as seen from the top as it is being loaded with a shell whose length is shorter than that for which the mill is set up
  • FIG. 2 shows the measuring process of the short shell in the entry pusher trough, as viewed from the top
  • FIG. 3 shows the feeding mechanism, as viewed from the top, whereby the new shell is shown after the entry push operation is completed, and
  • FIG. 4 is a diagrammatic representation of the control mechanism.
  • the preceding shell 2 is shown in the process of being reduced by the usual pilger rocking dies 1, the usual mandrel (not shown) being disposed within the shell 2.
  • a feed carriage 4 engages the free end of the shell 2 and feeds it through the dies.
  • the feed carriage may be of conventional design and driven in opposite directions by a rotatable elongated feed screw 4a (FIG. 4) which has engagement with a nut carried by the carriage 4.
  • the feed carriage may be opened, in usual manner, for feeding of a new shell axially therethrough for disposition between such carriage and the free end of the preceding shell. All of the foregoing is well known in the art and need not be described in detail.
  • the new shell 3 is moved from its dotted line position to disposition within the usual inlet trough 12.
  • a plurality of switches (such as switches closed by the weight of the shell) are disposed longitudinally of the trough.
  • three switches 6, 7 and 8 are disposed along the trough to span a distance corresponding to the length "L" of the longest shell to be fed.
  • the new shell 3 When the new shell 3 is disposed within the inlet trough, it activates one or more of the switches 6, 7 and 8 to start the drive of the entry pusher from its starting position defined by the limit switch 13 to move the pusher to the right as viewed in FIG. 1.
  • the drive for the entry pusher may take the form of a cable 15 (see FIG. 4) trained (as is well known in the art) over spaced pulleys 16,17 and wound on a drum 18 which is rotated by a motor (not shown).
  • the drum To drive the entry pusher to the right, the drum is driven in the direction of the arrow to wind the cable reach 20 onto the drum and to unwind the cable reach 21 from the drum.
  • the drum To return the entry pusher, the drum is driven in the opposite direction until it strikes the limit switch 13, whereupon the drive to the drum 18 is halted. All of this is conventional and need not be described in further detail.
  • the end 5a of the entry pusher 5 is spaced some distance from the adjoining end of the new shell 3 disposed in the trough 12.
  • the entry pusher end has engaged the adjoining end of the new shell 3 and has pushed this shell to the right to make contact with the limit switch 9, and activation of the latter switch stops the drive motor for the drum l8 and thus stops movement of the entry pusher 5 to the right.
  • the drum 18 has a drive connection to a device 22 which is operable to measure the length of the new shell 3.
  • a device 22 which is operable to measure the length of the new shell 3.
  • such measurement is effected by the revolution of the drum during the time it moves the entry pusher to the right from its starting point at the limit switch 13.
  • the device 22 may take the form of a Rotopulser made by the Louis Allis division of Litton Industries.
  • the Rotopulser 22 feeds its measuring information to a calculator device 23 which interpolates such information and feeds it to a second device 24 which may be similar to the device 22 and therefore may also take the form of a Rotopulser.
  • the calculator device 23 may take the form of an add-subtract controller which is also made by the aforementioned Louis Allis division.
  • the second Rotopulser has connection to mechanism M for rotating the feed screw 4a which drives the feed carriage and regulates the movement of the latter from a starting position defined by a limit switch 11 toward the pilger dies an amount equal to the length of the shell 3.
  • Rotopulser 24 After the feed carriage 4 has travelled the distance Le (the length of the new shell) to the right (FIG. 2) from its starting position at switch 11, Rotopulser 24, through an automatic sequence control which may be of commercial form, interrupts the drive of the pilger dies, returns the feed carriage 4 in opened condition to its starting position at switch ll, opens the mandrel lock and pushes the new shell 3, by means of the entry pusher 5, through the feed carriage onto the mandrel while the shell 2 already being processed and the mandrel are locked by the stopped dies 1, until both shells 2 and 3 contact, whereupon the feed carriage is again closed, the pusher carriage returned to its starting position at switch 13, the mandrel lock is again closed and the pilger dies again operated to work on the preceding shell as the feed carriage 4 moves to push both shells to the right.
  • the original mill design requires the feed carriage 4 to travel the distance between safety limit switch 10 and switch 1 1 and switch 10 may be adjusted for a given maximum length of a certain production run.
  • our invention pennits a decrease in this time loss and thus provides for maximum efiiciency in the mill when feeding shells that are shorter than the maximum length for which the mill is set.
  • the method of feeding shells of predetennined length and shorter lengths to the dies of a pilger mill comprising feeding a shell of shorter length in a direction toward said dies by means of an entry pusher, measuring the length of the newly fed shell while a feed carriage is moving a preceding shell through the pilger dies, limiting movement of said feed carriage from a starting position to the length of said newly fed shell, stopping action of the pilger dies on said preceding shell when said feed carriage has moved said limited amount,
  • Apparatus for feeding shells of predetermined length and shorter lengths to the dies of a pilger mill comprising an entry pusher for pushing a shell of certain length in a direction toward said pilger dies, a feed carriage for pushing a preceding shell through said pilger dies, means for measuring the length of said certain length shell, means for regulating the movement of said feed carriage in a direction toward said pilger dies from a predetermined starting position to any amount between said starting position and a maximum position, and calculator means affected by the measured length of said certain length shell and correspondingly affecting said regulating means to move said feed carriage from its starting position a distance corresponding to said measured length, whereby said feed carriage may be returned to its starting position, said certain length shell may be interposed between said feed carriage and said preceding shell, and said feed carriage again moved toward said pilger dies to feed said certain length shell, and the preceding shell against which it is abutted, toward and through said pilger dies.
  • Apparatus for feeding shells of predetermined length and shorter lengths to the conventional dies of a pilger mill which operate in conjunction with a conventional mandrel comprising an entry pusher for pushing a shell of certain length in a direction toward said pilger dies, a feed carriage for pushing a preceding shell through said pilger dies, at first measuring device affected by pushing movement of entry pusher for measuring the length of said certain length shell, a second measuring device for regulating movement of said feed carriage in a direction toward said pilger dies from a predetermined starting position to any amount between said starting position and a maximum position corresponding to shells of said predetermined length, and a calculating device afi'ected by said first measuring device and affecting said second measuring device, operable when said certain length shell is shorter than said predetermined length, to limit movement of said feed carriage from said starting position to an amount equal to the length of said shorter shell, whereby said feed carriage may be returned to its starting position, said shorter shell may be interposed between said feed carriage and said preceding shell

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)
US82739A 1969-05-16 1970-10-21 Method and device for feeding of cold pilger mills Expired - Lifetime US3659446A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1925340A DE1925340C3 (de) 1969-05-16 1969-05-16 Vorrichtung zum Speisen von Kaltpilgerwalzwerken
US8273970A 1970-10-21 1970-10-21

Publications (1)

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US3659446A true US3659446A (en) 1972-05-02

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US82739A Expired - Lifetime US3659446A (en) 1969-05-16 1970-10-21 Method and device for feeding of cold pilger mills

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US (1) US3659446A (de)
DE (1) DE1925340C3 (de)
FR (1) FR2047714A5 (de)
GB (1) GB1268020A (de)

Cited By (7)

* 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
FR2376706A1 (fr) * 1977-01-10 1978-08-04 Mannesmann Ag Dispositif d'alimentation de tubes pour laminoir a froid a pas de pelerin
FR2495968A1 (fr) * 1980-12-12 1982-06-18 Mannesmann Ag Procede pour l'amelioration de l'etat de surface de tubes lamines a pas de pelerin et laminoir pour la mise en oeuvre de ce procede
EP0079295A1 (de) * 1981-11-11 1983-05-18 MANNESMANN Aktiengesellschaft Verfahren und Vorrichtung zum Herstellen von Rohren in einem Kaltwalzwerk
US5216911A (en) * 1992-01-21 1993-06-08 Westinghouse Electric Corp. Automatic cold-pilger mill stop apparatus
US20090255312A1 (en) * 2008-04-15 2009-10-15 Glen Stapleton Apparatus for feeding and turning tube products into a pilger mill machine
CN105710139A (zh) * 2016-04-20 2016-06-29 中国重型机械研究院股份公司 一种坯料长度检测系统及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2922941C2 (de) * 1979-06-01 1985-12-05 Mannesmann AG, 4000 Düsseldorf Kaltpilgerwalzwerk

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914973A (en) * 1955-11-08 1959-12-01 Edward V Crane Pilger mill

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914973A (en) * 1955-11-08 1959-12-01 Edward V Crane Pilger mill

Cited By (8)

* 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
FR2376706A1 (fr) * 1977-01-10 1978-08-04 Mannesmann Ag Dispositif d'alimentation de tubes pour laminoir a froid a pas de pelerin
FR2495968A1 (fr) * 1980-12-12 1982-06-18 Mannesmann Ag Procede pour l'amelioration de l'etat de surface de tubes lamines a pas de pelerin et laminoir pour la mise en oeuvre de ce procede
EP0079295A1 (de) * 1981-11-11 1983-05-18 MANNESMANN Aktiengesellschaft Verfahren und Vorrichtung zum Herstellen von Rohren in einem Kaltwalzwerk
US5216911A (en) * 1992-01-21 1993-06-08 Westinghouse Electric Corp. Automatic cold-pilger mill stop apparatus
US20090255312A1 (en) * 2008-04-15 2009-10-15 Glen Stapleton Apparatus for feeding and turning tube products into a pilger mill machine
US8161786B2 (en) 2008-04-15 2012-04-24 Glen Stapleton Apparatus for feeding and turning tube products into a pilger mill machine
CN105710139A (zh) * 2016-04-20 2016-06-29 中国重型机械研究院股份公司 一种坯料长度检测系统及方法

Also Published As

Publication number Publication date
FR2047714A5 (de) 1971-03-12
DE1925340C3 (de) 1975-05-07
GB1268020A (en) 1972-03-22
DE1925340A1 (de) 1970-11-19
DE1925340B2 (de) 1974-10-03

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Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP.OF OH;REEL/FRAME:004458/0765

Effective date: 19850610

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Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307

Effective date: 19860630

Owner name: PITTSBURGH NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307

Effective date: 19860630

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Owner name: PITTSBURGH NATIONAL BANK

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:WEAN UNITED INC./NOW WEAN INCORPORATED PA CORP.;REEL/FRAME:005004/0152

Effective date: 19881013