US3791184A - Skew rolling of solid ingots - Google Patents

Skew rolling of solid ingots Download PDF

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Publication number
US3791184A
US3791184A US00175361A US17537171A US3791184A US 3791184 A US3791184 A US 3791184A US 00175361 A US00175361 A US 00175361A US 17537171 A US17537171 A US 17537171A US 3791184 A US3791184 A US 3791184A
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US
United States
Prior art keywords
cross bar
stand
center line
ingot
axis
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
US00175361A
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English (en)
Inventor
G Pfeiffer
H Kran
W Feldmann
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Application granted granted Critical
Publication of US3791184A publication Critical patent/US3791184A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills

Definitions

  • the present invention relates to a skew rolling mill for piercing solid ingots such as round bars.
  • Such mills include drive spindles or shafts for the rolls and a mandrel rod on a thrust block.
  • a plunger or ram is provided to push the ingot into the mill, the plunger beingoperated by rod linkage or by piston and cylinder control or the like.
  • the invention relates particularly to replacement of the conventional ingot pusher by a device forcing the ingot into the mill during piercing.
  • the known devices are not suitable for this purpose as they are unable to exert significant pressure upon the ingot.
  • Skew rolling mills and those with conical rolls are known for expanding hollow ingots using means for spinning the hollow ingot during expanding.
  • These means for spinning include a cross bar bearing against a support and being movable under power.
  • a tool head is mounted on the cross bar that can be turned on an axis and can be pivoted in every direction transverse to that axis. Hydraulic means or threaded spindles are used for displacing the rod.
  • the cross bar to an elongated transmission element that can be wound on drums such as chains.
  • the drums that are provided for this purpose, are placed only slightly apart from the mill stand and to both sides of the center line of rolling and in between the drive spindles.
  • the pitch circles of the drums are to be tangent to a. plane through the center of rolling, and the drums are driven in unison.
  • the elongated elements are to. be chains, the drums being chain or sprocket wheels accordingly; Utilization of chains or the like that can be reeled, permits reduction of the overall dimension of the mill, particularly as compared with the several drives outlined above. Significantly then, already existing rolling mills can be improved in accordance with the teaching of this invention. Neither, the pivot range of the rolls, nor ingot feeding is detrimentally influenced by such supplementing equipment.
  • FIG. 1 is a top elevation of a displacement drive for the pusher in a rolling mill in accordance with the preferred embodiment of the invention.
  • FIG. 2 is a cross section view through that drive along lines IIII in FIG. 1.
  • reference numeral 1 denotes the rolling stand for the rolls which are driven by a motor (not shown) via gearing 4 and drive and steering spindles 2 and 3.
  • the delivery end of the mill is to the right of stand 1, and there is provided a thrust supported mandrel for ingot piercing as is known per se for piercing mills.
  • the mandrel with rod and support is not shown and is conventional.
  • the rolling mill is illustrated with a round bar ingot 5 in the feeder path, to the left of the stand.
  • the ingot sits on support elements 7 in a trough like configuration 6. Ingots are fed into the particular immediate feeder path from above and laterally as indicated by arrows 8.
  • the immediate feeder path is, of course, on the center line 9 of rolling.
  • Two chains or sprocket wheels 10 and 1 l are mounted on a common shaft 12; the wheels are disposed respectively on both sides of center line 9 and in between the drive elements 2 and 3.
  • Shaft 12 extends transversely to center line 9 and is driven by a motor 13.
  • Chains l4 and 15 loop around sprocket wheels 10 and 11 for driving them respectively upon turning by operation of motor 13.
  • a cross bar 16 is provided and connected to the two chains, also on both sides of the center line.
  • the upper stringers of the two chains 14 and 15 are disposed in a horizontal plane that includes center line 9 of rolling, which also coincides with the center axis of ingot 5 in the feeding position. Accordingly, the pitch circle of wheels 10 and 11 are tangent to that plane.
  • the cross bar 16 serves as mount for a head 17 permitting turning of the head on an axis that coincides also with center line 9. Additionally, the ball-andsocket like support and configuration of head 17 in cross bar 16 permits pivoting of the head on any axis directions transverse to the axis of rotation of the head as defined.
  • a pushing rod 19 is mounted on head 17 and engages ingot 5, thereby spanning the distance between head and ingot, and more particularly, the rod 19 spans the distance between the most advanced position of cross bar 16 and the rolling plane.
  • Cross bar 16 bears against support rails 20 and 21.
  • cross bar 16 Upon driving the chains 14 and 15 in proper direction, i.e., upon pulling the upper stringers of the chains, cross bar 16 is pulled towards the mill, whereby pusher rod 19 is forced against the ingot. Accordingly, the ingot moves into the rolling gap against the mandrel. That application of force upon the ingot persists during rolling and may be subject to control through torque control of motor 13.
  • the chains 14 and 15 may have actually endless configuration, the lower portion leads underneath cross bar 16. Idler wheels or drums 22 and 23 complete the reeling paths. Upon reversing drive 13, the chains pull on cross bar 16 from the other side to return the cross bar with head and pusher to the initial position. That return can be carried out quite rapidly as comparatively little torque is needed.
  • a skew rolling mill for piercing solid ingots having a stand with a center line and a mandrel on that line and disposed on one side of the stand, and pushing means disposed on the other side of the stand, the improvement comprising in combination:
  • a cross bar disposed for mounting one end of the pushing means, (a) for rotation on said center line as an axis, and (b) for pivoting transverse to said axis in said cross bar, the pushing means extending on that axis with its other end towards the ingot and the mandrel;
  • first and second drum means disposed respectively on both sides of the center line, and on said other, the feeder side of the stand, the drum means having pitch circle that is tangent to a plane that runs through the center line;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US00175361A 1970-09-03 1971-08-26 Skew rolling of solid ingots Expired - Lifetime US3791184A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7033450U DE7033450U (de) 1970-09-03 1970-09-03 Schraegwalzwerk zum lochen massiver bloecke.

Publications (1)

Publication Number Publication Date
US3791184A true US3791184A (en) 1974-02-12

Family

ID=6614217

Family Applications (1)

Application Number Title Priority Date Filing Date
US00175361A Expired - Lifetime US3791184A (en) 1970-09-03 1971-08-26 Skew rolling of solid ingots

Country Status (6)

Country Link
US (1) US3791184A (show.php)
DE (1) DE7033450U (show.php)
FR (1) FR2105218B1 (show.php)
GB (1) GB1334101A (show.php)
IT (1) IT951587B (show.php)
SE (1) SE387060B (show.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106513441A (zh) * 2016-11-24 2017-03-22 北京京诚之星科技开发有限公司 一种三辊穿孔机

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US323510A (en) * 1885-08-04 suppes
US389585A (en) * 1888-09-18 Seamless tubes
US954880A (en) * 1909-04-28 1910-04-12 Mathias Peters Rolling-mill for producing tubes.
US1455703A (en) * 1923-01-09 1923-05-15 Becker Theodor Process and device for producing hollow blocks for manufacturing seamless tubes
US1882655A (en) * 1928-09-27 1932-10-18 Walter R Clark Machine for rolling or piercing billets
US2005155A (en) * 1932-02-23 1935-06-18 Bolton C Moise Tube expanding mill
US2159123A (en) * 1936-11-09 1939-05-23 Nat Tube Co Rolling mill mandrel
US2958244A (en) * 1956-08-17 1960-11-01 Blaw Knox Co Piercer inlet table
US3407638A (en) * 1966-03-24 1968-10-29 Kinefac Corp Method for forming serrated or corrugated hollow tubes
US3656331A (en) * 1969-03-29 1972-04-18 Kabel Metallwerke Ghh Apparatus for producing annular corrugated tubing

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US323510A (en) * 1885-08-04 suppes
US389585A (en) * 1888-09-18 Seamless tubes
US954880A (en) * 1909-04-28 1910-04-12 Mathias Peters Rolling-mill for producing tubes.
US1455703A (en) * 1923-01-09 1923-05-15 Becker Theodor Process and device for producing hollow blocks for manufacturing seamless tubes
US1882655A (en) * 1928-09-27 1932-10-18 Walter R Clark Machine for rolling or piercing billets
US2005155A (en) * 1932-02-23 1935-06-18 Bolton C Moise Tube expanding mill
US2159123A (en) * 1936-11-09 1939-05-23 Nat Tube Co Rolling mill mandrel
US2958244A (en) * 1956-08-17 1960-11-01 Blaw Knox Co Piercer inlet table
US3407638A (en) * 1966-03-24 1968-10-29 Kinefac Corp Method for forming serrated or corrugated hollow tubes
US3656331A (en) * 1969-03-29 1972-04-18 Kabel Metallwerke Ghh Apparatus for producing annular corrugated tubing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106513441A (zh) * 2016-11-24 2017-03-22 北京京诚之星科技开发有限公司 一种三辊穿孔机
CN106513441B (zh) * 2016-11-24 2018-07-13 北京京诚之星科技开发有限公司 一种三辊穿孔机

Also Published As

Publication number Publication date
SE387060B (sv) 1976-08-30
FR2105218A1 (show.php) 1972-04-28
IT951587B (it) 1973-07-10
GB1334101A (en) 1973-10-17
DE7033450U (de) 1970-12-23
FR2105218B1 (show.php) 1974-05-31

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