US2192808A - Feeding apparatus for pilger mills - Google Patents

Feeding apparatus for pilger mills Download PDF

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Publication number
US2192808A
US2192808A US197370A US19737038A US2192808A US 2192808 A US2192808 A US 2192808A US 197370 A US197370 A US 197370A US 19737038 A US19737038 A US 19737038A US 2192808 A US2192808 A US 2192808A
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United States
Prior art keywords
feeding
nut
stock
feed
spindle
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
US197370A
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English (en)
Inventor
Bungelaar Alfred Van Den
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.)
Tube Reducing Corp
Original Assignee
Tube Reducing Corp
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 Tube Reducing Corp filed Critical Tube Reducing Corp
Application granted granted Critical
Publication of US2192808A publication Critical patent/US2192808A/en
Anticipated expiration legal-status Critical
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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
    • 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

  • This invention relates to feeding apparatus for pilger rolling mills, particularly mills adapted for cold pilgering.
  • the rolling action takes place in steps, that is, the article being rolled, for example, a tube or rod, must be fed forward to the pilger rolls in successive steps.
  • steps that is, the article being rolled, for example, a tube or rod
  • pilger rolls having fixed axes are employed, the article being rolled, i. e., the workpiece, must have a longitudinal reciprocation in the direction of the rolls, the article being gripped by the rolls and moved in one direction, and returned to a forward position between the rolls when released from them.
  • the purpose of the present invention is to overcome these disadvantages and avoid ierm 1938, Sfl'lai No. 197,370
  • the invention provides for unlimited adjustment of the feed during the rolling action, not merely a few changes or steps, and also provides for effect- 5 ing the return movement by the use of the same parts which are employed for feeding.
  • the objects of the invention are accomplished by the provision of a threaded nut rotating on a feed spindle, the m nut being intermittently turned rearward on the spindle and pushed forward to carry the spindle with it by a power pushing device.
  • Fig. 1 is a side elevation of a pilger mill having reciprocating rolls and embodying the im- 20 proved feed device;
  • Fig. 2 is a central vertical section of the left or rear portion of Fig. 1;
  • FIG. 3 is-a top plan view of the parts shown in Fig. 2; and 25 Fig. 4 is an enlarged view corresponding to a portion of Fig. 2, but showing a slightly modifled mechanism.
  • the main gears A and B actuate a driving rod C connected 30 to the roll or rocker carriage D adapted to move to and fro on the ways or rails E.
  • the rolls F may be co-ordinated in their movement by suitable gears cooperating with one or more gear racks G.
  • the pinion for one of the rolls is indi- 35 cated by the reference character H.
  • a spindle M serves to feed the clamp and workpiece.
  • the mechanism for operating this spindle to feed the workpiece 49 or stock is disposed in the housing N, and is shown in detail in Figs. 2 and 3. r
  • the spindle M is not rotatable, butis slidable through splined sleeves l and 2 secured in the walls of the housing N. do Between the walls of the housing a rotatable threaded not 3 is placed upon the spindle M. Adjacent the spindle, within the housing N, there is provided a constantlyrotating shaft 4 driven from the main power drive and provided with a 59 cam 25. The com operates a lever 7 through a cam follower roller 8, the lever 1 moving about a pivot t. A spring 9 continuously presses the roller 8 against the cam 5. The upper end of the lever l is disposed adjacent one face or the nut 55 3 for pushing the same forward when the lever is released by the cam.
  • the nut is rotated rearwardly during the same time that the cam is moving the lever l rearwardly.
  • the nut 3 may be rotated in any suitable manner. As illustrated, it is provided with gear teeth and meshes with a gear ll which is loosely mounted on the shaft of a motor 12. Means are provided for selectively driving the gear I slowly in the direction' to feed the stock and rapidly in the reverse direction to return the spindle to a rearward position. For rapid or return drive, a clutch I5 is operated to connect the gear H directly with a gear l3 keyed to the motor shaft.
  • a clutch I8 is operated, the clutch l5 being disengaged at the same time, to operate the gear I4 from a gear 22 loosely mounted on the motor shaftand driven from the gear l3 through a reduction gear train, including gears l1 and IS on a first jack shaft and gears l8 and 2
  • the apparatus as thus far described operates in the following manner: By the rotation of the cam 5 in the direction of the arrow, the lever l is suddenly released after the roller 3 on the lever has passed over the highest point of the cam, so that the spring 3 causes the lever II to push the nut 3, and with it the spindle M and the workpiece L in feeding direction.
  • the forward movement of the nut 3 is limited by'a fixed stop 23 which might be integral with the guide member 2.
  • the longitudinal movement provided for the nut 3 between thestop 23 and the lever I when in its rearmost position, that is, the position where the roller 3 on the lever is disposed on the highest point of the cam 3, produces the maximum feed which the device can effect. From this maximum value the feed can be regulated without steps, that is, by an indefinite number of gradual increments, to 'zero.
  • feed is meant the increment of length of stock which is moved forward intermittently to the reducing devices. This may be referred to as an absolute movement of the stock as distinguished from reciprocation found in the more orthodox type of pilger mills.
  • the feed occurs while the stock is released between attacks of the rolls or rockers.
  • the nut by continued rotation will be moved on the spindle M in the rearward or anti-feeding direction while the lever is also moving rearwardly. It will thus be seen that the number of rotations of the motor i2 during a predetermined period of time determines the extent to which the nut will be moved rearwardly on the spindle beforethe next forward movement of the lever I, and hence determines the amount of feed.
  • any suitable means R may be employed for regulating the speed 'of the motor l2.
  • the motor may be poly-adjustable and provided with resistances; or it may be connected with the main driving motor through Leonard connections, as the number of rotations of the motor l2 naturally depends on the main drive because of the cam 6.
  • the driving of the nut throught the regulating motor might be eliminated and the nut instead be driven through the main drive of the machine.
  • a special motor is necessary, it is simpler to use this motor as described for the regulation of the feed.
  • anti-friction means such as the roller bearing 24 and the interposed disc 25, as shown in Fig. 4, are provided. If desired also anti-friction means such as the roller bearing 28 and the interposed disc 21 may be placed between the other face of the nut and a reaction member slidably placed on the spindle and connected with the end of the lever ll.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls, comprising in combination, stock holding means, an intermittently operating device for feeding stock forward to the rolls, and constantly operating means cooperating therewith which moves back a predetermined extent relative to said stock holding means for each stroke of said intermittently operating device, said intermittently operating device acting upon and through said constantly operating means.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls, comprising in combination, a longitudinal member connected to the stock to be rolled, a
  • reciprocating feeding device movable along said amaeos rearward position, an element mounted on said member for cooperating with said device for moving the member forward, and means for moving said element rearwardly when said device moves rearwardly.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls comprising in combination, a stock holding means, a constant stroke feeding device actuated intermittently in feeding direction, a member moving continuously against feeding direction relative to said stock holding means ,and cooperating at intervals with said feeding device for feeding the stock, and means for varying the speed of movement of said member for varying the amount of feed.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls, comprising in combination, stock holding means, a constant stroke feeding device actuated intermittently in feeding direction, a member moving continuously against feeding direction relative to said stock holding means and cooperating at intervals with said feeding device for feeding the stock, and means for varying the speed of movement of said member for varying the amount of feed, said speed varying means having a large number of gradual speed-change adjustments.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls, comprising in combination, stock holding means, a constant stroke feeding device actuated intermittently in feeding direction, a member moving continuously against feeding direction relative to said stock holding means and cooperating atintervals with said feeding device for feeding the stock, and means for varying the speed I of movement of said member for varying the amount of feed, said speed varying means comprising a drive motor device having means for varying the speed of said motor device in a lar number of small increments.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls, comprising in combination, a feed spindle, a reciprocating feed device, a member threaded on said spindle for cooperating with said feed device, means for turning said member slowly on said spindle as a measure of the feeding action, and means for turning said member rapidly in the reverse direction to return said spindle to a rearward position.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls, comprising in combination, a feed spindle, a constantly turning feed nut thereon, said nut having a variable range of movement during a unit of time, and a reciprocating feed device cooperating with said nut having a range of movement greater than the greatest movement of said nut reverse direction on said spindle, means for vary-.
  • Feeding apparatus for pilger rolling mills for feeding increments of length of stock to the rolls, comprising in combination, a threaded spindle, a nut threaded thereon, a lever for pushing said nut and spindle in feeding direction, resilient means constantly urging said lever in feeding direction, a constantly rotating cam for moving said lever in reverse or anti-feed direction, continuously acting means for moving said nut in reverse direction on said spindle, means for varying the speed of said nut on said spindle, and anti-friction means disposed between said nut and said step.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Control Of Metal Rolling (AREA)
US197370A 1937-03-31 1938-03-22 Feeding apparatus for pilger mills Expired - Lifetime US2192808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE493428X 1937-03-31

Publications (1)

Publication Number Publication Date
US2192808A true US2192808A (en) 1940-03-05

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US197370A Expired - Lifetime US2192808A (en) 1937-03-31 1938-03-22 Feeding apparatus for pilger mills

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US (1) US2192808A (en(2012))
BE (1) BE427299A (en(2012))
FR (1) FR835868A (en(2012))
GB (1) GB493428A (en(2012))

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703999A (en) * 1953-11-24 1955-03-15 See Fabriks Aktiebolag Pilgrim rolling mills
US2878697A (en) * 1953-06-03 1959-03-24 Thompson Prod Inc Machine for rolling metal
US2923187A (en) * 1954-03-29 1960-02-02 Bengtsson Fritz Gunnar Tube rolling mill
US2969700A (en) * 1954-03-23 1961-01-31 Thompson Ramo Wooldridge Inc Machine for rolling metal
US3503241A (en) * 1965-09-23 1970-03-31 Mannesmann Meer Ag Cold rolling mill
US4955220A (en) * 1989-11-22 1990-09-11 Sandvik Special Metals Corporation Low inertia mechanism for repositioning a workpiece in a rocker mill
US5351515A (en) * 1993-01-19 1994-10-04 Sandvik Special Metals Corporation Apparatus and method for reducing the diameter of a cylindrical workpiece
US10166528B1 (en) * 2015-01-16 2019-01-01 University Of South Florida Ammonia removal in freshwater and saltwater systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2230427B1 (en(2012)) * 1973-05-24 1977-07-29 Vallourec

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2878697A (en) * 1953-06-03 1959-03-24 Thompson Prod Inc Machine for rolling metal
US2703999A (en) * 1953-11-24 1955-03-15 See Fabriks Aktiebolag Pilgrim rolling mills
US2969700A (en) * 1954-03-23 1961-01-31 Thompson Ramo Wooldridge Inc Machine for rolling metal
US2923187A (en) * 1954-03-29 1960-02-02 Bengtsson Fritz Gunnar Tube rolling mill
US3503241A (en) * 1965-09-23 1970-03-31 Mannesmann Meer Ag Cold rolling mill
US4955220A (en) * 1989-11-22 1990-09-11 Sandvik Special Metals Corporation Low inertia mechanism for repositioning a workpiece in a rocker mill
US5351515A (en) * 1993-01-19 1994-10-04 Sandvik Special Metals Corporation Apparatus and method for reducing the diameter of a cylindrical workpiece
US10166528B1 (en) * 2015-01-16 2019-01-01 University Of South Florida Ammonia removal in freshwater and saltwater systems

Also Published As

Publication number Publication date
FR835868A (fr) 1939-01-05
GB493428A (en) 1938-10-07
BE427299A (en(2012))

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