US3503241A - Cold rolling mill - Google Patents

Cold rolling mill Download PDF

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Publication number
US3503241A
US3503241A US555420A US3503241DA US3503241A US 3503241 A US3503241 A US 3503241A US 555420 A US555420 A US 555420A US 3503241D A US3503241D A US 3503241DA US 3503241 A US3503241 A US 3503241A
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United States
Prior art keywords
roll
rings
groove
cold rolling
rolling mill
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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
US555420A
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English (en)
Inventor
Walter Vom Dorp
Fritz Zeunert
Horst Stinnertz
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Mannesmann Meer AG
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Mannesmann Meer AG
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Filing date
Publication date
Application filed by Mannesmann Meer AG filed Critical Mannesmann Meer AG
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Publication of US3503241A publication Critical patent/US3503241A/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
    • B21B21/02—Rollers therefor

Definitions

  • the invention relates to cold rolling mills, and relates more particularly to cold rolling mills of the pilger or step-back type. Still more particularly, the invention relates to such cold rolling mills of the step-back type, that have an oscillating rolling frame including acceleration power and mass frame balancing means.
  • the invention relates to cold rolling mills of the step-back type, which are particularly suitable for that type rolling of tubes.
  • the working groove In cold rolling mills of the step-back type, for use in connection with the rolling of tubes, the working groove generally is disposed in the so-called roll jaw, which is an inset piece that is held exchangeably by means of suitable mounting means in a cutout; it is known to provide rolls with two or more working grooves, in accordance with German Patent No. 1,067,758, in order to obtain thereby an additional increase in production, particularly as, due to the power and mass force balancing means system, there will result a substantial lowering of the stress applied to the transmission that is disposed between the driving motor and the crank shaft; this, in turn, permits a substantial increase in the available rotational speed, with resultant production increase.
  • the instant invention provides for a cold rolling mill of the step-back type, with oscillating rolling frame means and power and mass force balancing means, a rotatable carrier shaft, at least one roll groove ring being exchangeably mounted on the carrier shaft and having an external circumference defining an extended working groove length surpassing 220; this extension of the working groove length corresponds to an extension of from about 1.5 to about 2.5 times the lengths of the roll jaws heretofore used.
  • each roll groove ring is shrunk on the carrier shaft without use of any slot and key, and is fixed in its position in peripheral direction relative to the shaft by position determining means which include a portion near one lateral face of the roll groove ring, a portion of a radially extending member formed on the shaft, and a wedge member that extends between these portions.
  • the rolls are provided with inset groove jaws; and where the working groove length is doubled, there must also be doubled the roll diameter, as a result of which the weight of the rolling frames increases considerably furthermore, the roll jaws thus would assume prohibitively large dimensions, and lastly the roll pressure would increase disadvantageously correspondingly.
  • Rolling mill constructions have previously been made that included so-called roll groove rings.
  • a roll groove ring is formed of a ring made of suitable material, which is positioned on the roll shaft either by means of slot and key, or by means of a square fit.
  • this ring there has been worked the necessary groove out, which corresponds in its lengths to the set-in roll jaws, with the advantage, however, of a smaller roll diameter.
  • the instant invention provides for a considerable lengthening of the working groove length and yet maintaining the same ring roll diameter as had been done for rolls with jaw grooves. In this manner, the stroke of the oscillating rolling frame is increased without increasing the Work rotations per minute, and thus a corresponding yield increase is achieved.
  • the working groove length would need to be increased from 40 in. to 45 in., if the reaction forces and the taper of the arbor are to be held within manageable magnitudes.
  • the instant invention provides for power and mass force balancing and thereby for a reduction in the stress of the movable parts including the transmission.
  • the combination of the aforementioned and later described means employed in accordance with the invention results in a considerably longer working groove length and, coupled with power and mass force balancing, provides for a machine which in its performance matches that of a machine of the prior art that had two or more working grooves side by side.
  • the high stresses to which the working grooves are subjected, affected, of course, in the prior art adversely the life of these roll grooves.
  • this drawback is compensated by the great ease of mounting and dismounting of the parts for repair and for exchange.
  • the roll rings were positively connected with the carrier shaft by means of a key and slot arrangement; at multiple machines of this type, the length of the key and slot were so extended that spacer rings that were disposed between the multiple roll rings were held by the same key and slot as the roll rings themselves. As this means of attachment was, however, not entirely satisfactory, the roll rings have additionally been shrunk onto the respective shafts.
  • the carrier shaft has a radially extending member, for instance a flange, that has a number of, namely one or more axial grooves.
  • the roll groove ring has at one of its end faces the same number of grooves but which are radial (instead of axial).
  • a prismatic wedge member extends between each axial and radial groove, to position the roll ring peripherally relative to the carrier shaft.
  • the spacer rings will also have corresponding radial grooves in the faces, so that with the aid of prismatic wedge members, the peripheral position of the roll rings and of the spacer rings relative to the carrier shaft will be fixed; furthermore, these groove-wedgegroove connections provide for additional holding be tween the parts, so that now each roll groove ring which is shrunk onto the carrier shaft and is positioned in the aforesaid groove-wedge-groove manner is positively connected and positioned for rotation with the carrier shaft.
  • heating means for instance inductive heating means for such a carrier shaft and roll groove rings and perhaps also spacer rings thereon
  • the instant invention provides thus for cold rolling mills of the step-back type which, when using only one roll groove ring, permit large production; yet, permit the side-by-side arrangement of several roll groove rings rendering possible great economies in initial tool costs and in erection costs, and making possible the economic production of first class end products.
  • FIG. 1 is a schematic vertical sectional view of a cold rolling mill of the step-back type with frame and motor and balancing means;
  • FIG. 1b is a large scale schematic view, partly in section, of a roll groove ring and taper of the arbor, showing the circumferential groove of the roll groove ring;
  • FIG. 2 is a sectional view of a carrier shaft having a single roll groove ring mounted thereon;
  • FIG. 3 is a sectional view, similar to FIG. 2, but showing a carrier shaft with three roll groove rings mounted thereon, with two spacer rings each between two roll groove rings;
  • FIG. 4 is a schematic view, partly in section, showing a carrier shaft suspended vertically on which there are mounted three roll groove rings, and inductive heating means for heating the rings for their subsequent removal off the shaft.
  • FIG. 1 there is provided a cold rolling mill of the step-back type that includes mass balancing means 1, a motor 2, an oscillating rolling frame 3, and a roll groove ring 4.
  • the rack which is needed for turning the roll groove rings has been omitted from FIG. 1, for the sake of clarity and simplicity.
  • the circumferential form of the roll groove rings 4 exhibited in FIG. 1b shows the stroke x that is rendered possible by this design, and furthermore also the tapered shape of the bloom to be formed on the rolling mill is shown in FIG. 1b.
  • the reduction work commences with the control stroke a for the feed; then there follows the reduction groove 17; thereafter there follows the smoothing groove c, and finally the control stroke d for the turning of the bloom.
  • the distance e is the entire work length, while x indicates the entire stroke.
  • the distance e corresponds to the developed work length of the roll groove ring 4, which length is about from 1.5 to about 2.5 ,times the developed work length of conventional roll jaws of the same groove diameter.
  • the roll groove rings 4 are shrunk onto the rotatable carrier shaft 7 for positive rotational connection, yet without use of any shaft key.
  • the carrier 7 has a radially extending member, such as a flange 8 which has near its circumference in axial direction prismatic axial grooves 9.
  • the amount of grooves 9 per flange 8 may vary with the need.
  • the roll groove rings 4 on the other hand, have on their faces the same amount of grooves 10 which, however, extend in radial direction (see FIG. 2).
  • spacer rings 11 between the roll groove rings 4.
  • the spacer rings 11 also have in their faces the same amount of radially directed grooves 12.
  • the roll groove rings 4 are fixed peripherally relative to the carrier shaft and its pinion; where multiple roll groove rings are used (FIG. 3), they are coordinated in this manner in their development.
  • the wedge members 13 are secured from falling oil by means of rings 14.
  • FIG. 4 there is shown a means for a time-saving and easy dismounting of the rings off the carrier shaft.
  • Inductive heating means 15 are shown, though only schematically, which in the case of multiple roll groove rings on the carrier shaft may cover all the roll groove rings; where only single roll groove rings are used, the heating means may be so arranged that the parts thereof which do not cover any roll groove ring may selectively be disconnected electrically.
  • the carrier shaft After the pinion has been removed, will be suspended vertically, and then the heating means 15 will apply heat to the rings, of sufiicient quantity so that the rings may thereafter be slid downwardly off the shaft, without need for any special mechanical ring removing device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)
US555420A 1965-09-23 1966-06-06 Cold rolling mill Expired - Lifetime US3503241A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEM0066738 1965-09-23
DEM0067291 1965-11-16

Publications (1)

Publication Number Publication Date
US3503241A true US3503241A (en) 1970-03-31

Family

ID=25987759

Family Applications (1)

Application Number Title Priority Date Filing Date
US555420A Expired - Lifetime US3503241A (en) 1965-09-23 1966-06-06 Cold rolling mill

Country Status (4)

Country Link
US (1) US3503241A (enrdf_load_stackoverflow)
JP (1) JPS495828B1 (enrdf_load_stackoverflow)
DE (1) DE1427978C3 (enrdf_load_stackoverflow)
GB (1) GB1129969A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650138A (en) * 1968-09-28 1972-03-21 Giuseppe Persico Multiple tube-rolling pilger mills
DE2403686A1 (de) * 1974-01-24 1975-08-07 Mannesmann Meer Ag Verfahren zum herstellen von vorzugsweise ne-metall-rohren gut verformbaren werkstoffes durch kaltpilgern
JPS57176103U (enrdf_load_stackoverflow) * 1982-03-15 1982-11-08
US4386512A (en) * 1980-03-17 1983-06-07 Wean United, Inc. Pilger tube rolling mill
US4542566A (en) * 1982-11-15 1985-09-24 Corrugating Roll Corporation Corrugating roller
US4665114A (en) * 1982-02-04 1987-05-12 Morton Thiokol Inc. Stabilizer compositions and polymers containing same
WO2015154833A1 (de) * 2014-04-11 2015-10-15 Maschinenfabrik Köppern Gmbh & Co. Kg Verfahren und vorrichtung zur demontage und montage einer ringbandage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3019921C2 (de) * 1980-05-24 1984-11-22 Schmolz & Bickenbach, 4000 Düsseldorf Walze
DE3508924A1 (de) * 1985-03-13 1986-09-18 Josef Fröhling GmbH, Walzwerksmaschinenbau, 5960 Olpe Verfahren und vorrichtung zum reduzieren des querschnitts von stabfoermigem material bzw. warmen stranggussmaterial

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732042A (en) * 1928-06-25 1929-10-15 Pittsburgh Plate Glass Co Apparatus for rolling glass
US1938995A (en) * 1931-08-17 1933-12-12 Ross E Beynon Built-up roll
US2192808A (en) * 1937-03-31 1940-03-05 Tube Reducing Corp Feeding apparatus for pilger mills
US2537356A (en) * 1942-11-28 1951-01-09 See Fabriks Aktiebolag Rolling mill for the production of conical tubes
US2703999A (en) * 1953-11-24 1955-03-15 See Fabriks Aktiebolag Pilgrim rolling mills
US2787956A (en) * 1953-07-28 1957-04-09 Mosstype Roller Co Inc Printing plate cylinder and method of mounting or demounting same from a mandrel
US3030835A (en) * 1958-06-06 1962-04-24 Blaw Knox Co Tube rolling machine
US3309910A (en) * 1964-02-18 1967-03-21 Mannesmann Meer Ag Multiple cold rolling mill
US3335593A (en) * 1963-08-27 1967-08-15 Mannesmann Meer Ag Drive for rolling mill

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732042A (en) * 1928-06-25 1929-10-15 Pittsburgh Plate Glass Co Apparatus for rolling glass
US1938995A (en) * 1931-08-17 1933-12-12 Ross E Beynon Built-up roll
US2192808A (en) * 1937-03-31 1940-03-05 Tube Reducing Corp Feeding apparatus for pilger mills
US2537356A (en) * 1942-11-28 1951-01-09 See Fabriks Aktiebolag Rolling mill for the production of conical tubes
US2787956A (en) * 1953-07-28 1957-04-09 Mosstype Roller Co Inc Printing plate cylinder and method of mounting or demounting same from a mandrel
US2703999A (en) * 1953-11-24 1955-03-15 See Fabriks Aktiebolag Pilgrim rolling mills
US3030835A (en) * 1958-06-06 1962-04-24 Blaw Knox Co Tube rolling machine
US3335593A (en) * 1963-08-27 1967-08-15 Mannesmann Meer Ag Drive for rolling mill
US3309910A (en) * 1964-02-18 1967-03-21 Mannesmann Meer Ag Multiple cold rolling mill

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650138A (en) * 1968-09-28 1972-03-21 Giuseppe Persico Multiple tube-rolling pilger mills
DE2403686A1 (de) * 1974-01-24 1975-08-07 Mannesmann Meer Ag Verfahren zum herstellen von vorzugsweise ne-metall-rohren gut verformbaren werkstoffes durch kaltpilgern
US4386512A (en) * 1980-03-17 1983-06-07 Wean United, Inc. Pilger tube rolling mill
US4665114A (en) * 1982-02-04 1987-05-12 Morton Thiokol Inc. Stabilizer compositions and polymers containing same
JPS57176103U (enrdf_load_stackoverflow) * 1982-03-15 1982-11-08
US4542566A (en) * 1982-11-15 1985-09-24 Corrugating Roll Corporation Corrugating roller
WO2015154833A1 (de) * 2014-04-11 2015-10-15 Maschinenfabrik Köppern Gmbh & Co. Kg Verfahren und vorrichtung zur demontage und montage einer ringbandage
RU2671394C1 (ru) * 2014-04-11 2018-10-30 Машиненфабрик Кёпперн Гмбх Унд Ко. Кг Способ и устройство для демонтажа и монтажа кольцевого бандажа
AU2014390263B2 (en) * 2014-04-11 2019-05-16 Maschinenfabrik Koppern Gmbh & Co. Kg Method and apparatus for dismounting and mounting an annular sleeve
EP3129149B1 (de) 2014-04-11 2020-07-01 Maschinenfabrik Köppern GmbH. & Co. KG Verfahren zur demontage und montage einer ringbandage

Also Published As

Publication number Publication date
GB1129969A (en) 1968-10-09
DE1427978C3 (de) 1975-06-19
DE1427978B2 (de) 1974-10-31
DE1427978A1 (de) 1969-08-14
JPS495828B1 (enrdf_load_stackoverflow) 1974-02-09

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