US2056110A - Tube rolling mill - Google Patents

Tube rolling mill Download PDF

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Publication number
US2056110A
US2056110A US56099A US5609935A US2056110A US 2056110 A US2056110 A US 2056110A US 56099 A US56099 A US 56099A US 5609935 A US5609935 A US 5609935A US 2056110 A US2056110 A US 2056110A
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US
United States
Prior art keywords
tube
slide
swages
chuck
mandrel
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
US56099A
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English (en)
Inventor
Norton William John
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.)
Sir James Farmer Norton and Co Ltd
Original Assignee
Sir James Farmer Norton and Co Ltd
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 Sir James Farmer Norton and Co Ltd filed Critical Sir James Farmer Norton and Co Ltd
Application granted granted Critical
Publication of US2056110A publication Critical patent/US2056110A/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
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/005—Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand
    • 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

  • the object of my present invention is to provide improvements in the said type of mill which facilitate and expedite the production of the reduced tubes.
  • the mandrel is reciprocated through a definite path and does 20 not advance through the dies or rolls with the tube being rolled or reduced.
  • the tube alone has the increments of feed and turning movements imparted thereto and is freed from the mandrel at each cycle of operations.
  • the dies or rolls act to swage the tube during less than 180", preferably not more than 120 of each revolution of the dies and the carriage or slide by which the mandrel and tube are reciprocated is actuated by a crank, connecting rod and a-bell crank lever running in part in a cam track so as to compensate for the varying angularity of the crank and to give to the carriage or slide a rate of movement substantially the same as that resulting from the surfaceengagement of the swages and tube during the swaging stroke.
  • the extension of the tube due to its reduction by the swages results'in an advance through the dies.
  • the invention therefore comprises the im- 40 proved combinations and arrangements of parts as hereinafter described and claimed.
  • FIGS. 7, 8 and 9 are detailed views of parts included in the remaining figures, which will be hereinafter referred to.v
  • Figure 10 shows the relative positions of the swaszes and crank.
  • a slide 12 upon the bed a of the machine is mounted for reciprocatory movements a slide 12 (see also Figure 8 which is a sectional view a of the slide) to which is secured the rear 'end of a screw 0, which can be termed the feed screw, and 5 also a chuck or collet d for holding the rear end of a mandrelle.
  • the feed screw 0 isadapted for intermittent rotary movement as hereinafter de scribed and it turns a gear wheel I which meshes with a gear wheel g upon the sleeve h carrying 10 the chuck or collet d.
  • the slide b is reciprocated by the rod 2' to which it-is adjustably secured by nuts on the opposite sides of a lug it upon the slide through which the rod 2' passes.
  • the screw 0 can be given rotary movements by 15* the electric motor m through the sprocket wheels 12 and a chain.
  • the mandrel e passes through the chuck or collet q upon a slide 1' but isnot engaged by such chuck or collet.
  • the latter grips the tube s which is being reduced by the machine;
  • the feed screw 0 threads through a part if in the slide 1' (see Figure 9) which acts as a nut with respect to the screw,'reciprocatory movements of the screw causing corresponding reciprocatory movements of the nut and slide and 5 arotary,movement of the screw imparting an additional movement to the slide along the bed a.
  • a wheel-u in the slide is feather keyedto the screw 0 so that it turns with the latter and such wheel gears with a wheel 1;, which is upon a sleeve. 40 w rigid with the collet q so that rotary movements of the wheel 1; cause rotary movements of the collet or chuck q and the tube 8.
  • FIGS. 3 and 6 which show the forward section of the machine, there are a pair of rotary dies or swages Ill and I I, each made in two pairs and clamped upon and keyed to a driving shaft, the two shafts I ⁇ and I3 being geared together and driven by a suitable motor (not shown).
  • a crank arm I4 Upon the lower shaft I3 is a crank arm I4 with a crank pin I5 of adjustable throw therein.
  • A-connecting rod IG upon said crank pin is coupled to the fulcrum of a bell crank lever ill (see Figures 2, 5 and '7).
  • the said fulcrum pin has two slides l9, one .at each end of the pin, which run in straight slots '20 in v a frame 2
  • rollers 22 on one end of the bell crank lever l8, which run in cam slots 23 in the frame 2
  • the other end of the bell crank lever has a connecting rod 24 pivoted thereto, the said rod serving to reciprocate the rod iwhich is carried in brackets along one side of the machine base and which as already described traverses the slide b, to which the ends of the mandrel e and feed screw 0 are secured.
  • crank arm I4 is so situated with relation to the leading edge of the swage which first engages the tube that it is approximately 30 from the horizontal plane containing .the axis of the bottom swage and the path through which the axis of the fulcrum pin l1 travels in its slot 20. This disposition of the crank arm l4 provides that the compensation to be effected by the cam groove or slot 23 is a minimum as only. the'flatter. part of the circle of movement of the crank pin l5 has to be dealt with.
  • the rod 1' also reciprocates a slide 25 (see Figures 3 and 6) situated at the delivery side of the dies or swages, which carries a collet or chuck 26.
  • the latter is opened and closed upon the tube coming from the dies or swages by an inertia slide 21 which is coupled by links 28 to levers 29 operating the chuck jaws.
  • the collet or chuck is adapted to be turned by gear wheels 30. 3
  • the inertia slide 21 acts as follows:When the slide 25 moves to the right in Figure 3,, the slide 21 lags and so causes the links 28 to turn the levers 29 and ,close the chuck jaws upon the tube within the chuck. The two slides then move together carrying the tube with them.
  • The'chuck 26 serves to draw the and the tube end is gripped in the chuck q.
  • mandrel end comes between the swages as shown in Figures 3 and 10 at the start of each swaging stroke, the mandrel retreating during swaging due to the crank arm l4, crank pin l5, connecting rod l6, bell crank lever I1, connecting rod 24 and rod i which cause reciprocation of the slide b.
  • the mandrel e and tube s are turned through an angle which may be 90 by the action of the feed screw c which is turned by the ratchet wheel 12 and so imparts in addition to the reciprocatory movement a feed or forward motion to the'slide r and so to the tube s. The latter enters between the swages and is alternately swaged and released.
  • the mandrel When released it is fed forward and turned, the mandrel however always reciprocating between the same limits and being turnedon the forward stroke. In other words the tube gradually progresses 'over the mandrel.
  • the ratchet wheel p turns with it so that the screw has no rotary motion.
  • the tube end progresses towards and is finally engaged by the chuck 25 on its forward stroke until it has all been swaged down and leaves the swages.
  • one tube has been swaged for the major portionof its length, its end is released from the chuck q and a further tube is fed along the mandrel and its outer end gripped in the chuck q.
  • the latter is fed backwards along the machine base by rotating the motor m and freeing the ratchet wheel p.
  • the motor can also be operated to feed the chuck q to a position in which the tube is about to enter between the swages.
  • the rod i merely performing the forward propulsion, in which case the co-operating means (namely the bell crank lever l8 and asso- This action ciated'parts) might be dispensed with, the rod i engaging the slides b and 25. at one side only.
  • the co-operating means namely the bell crank lever l8 and asso- This action ciated'parts
  • the positions of the slides 2'and 25 can be adjusted with relation to the rod i by the nuts shown.
  • a head containing two rotary swages a third slide with a chuck thereon at the delivery side of the swages to engage the reduced tube, means for turning said chuck in unison with the other chucks, means actuated in unison with the swages for reciprocating the three slides through definite distances, and means whereby the chuck upon the third slide closeswhen that slide moves in a forward direction and opens when it moves in a reverse direction.
  • crank arm rotated with one of the swages, a crank pin upon said arm, a connecting rod upon said pin, a bell crank lever, the iulcrum pin of which moves in a straight path and is coupled to the connecting rod, a cam track or groove turn the bell crank lever about its fulcrum as,;it is reciprocated by said connecting rod, a second connecting rod coupled to the bell crank lever,
  • two swages having each a swaging surface covering an angle of about 120, a crank arm rotated in unison with one swage and being at an angle of 30 in the rear of the leading edge of the said swage, and means compensating ior the varying angularity oi the crank arm in transmitting reciprocatory motion to the slides.
  • a pair of swages'rotating continuously in one direction only a mandrel reciprocated from and to a definite point in relation to the swages, means for reciprocating the tube being swaged through the same length of traverse as the mandrel upon which it is placed, means imparting increments oi feed to the tube after each swaging operation as the tube moves towards the swages, and means turning both the tubeand the mandrel after each swaging operation as the tube and mandrel move towards the swages.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US56099A 1934-12-21 1935-12-24 Tube rolling mill Expired - Lifetime US2056110A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36671/34A GB449323A (en) 1934-12-21 1934-12-21 Improvements in tube rolling mills

Publications (1)

Publication Number Publication Date
US2056110A true US2056110A (en) 1936-09-29

Family

ID=10390225

Family Applications (1)

Application Number Title Priority Date Filing Date
US56099A Expired - Lifetime US2056110A (en) 1934-12-21 1935-12-24 Tube rolling mill

Country Status (4)

Country Link
US (1) US2056110A (xx)
BE (1) BE412923A (xx)
FR (1) FR799756A (xx)
GB (1) GB449323A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112496049A (zh) * 2020-10-30 2021-03-16 太原理工大学 一种用于轧制内波纹金属复合管的波纹辊传动机构

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112496049A (zh) * 2020-10-30 2021-03-16 太原理工大学 一种用于轧制内波纹金属复合管的波纹辊传动机构
CN112496049B (zh) * 2020-10-30 2022-08-26 太原理工大学 一种用于轧制内波纹金属复合管的波纹辊传动机构

Also Published As

Publication number Publication date
GB449323A (en) 1936-06-22
BE412923A (xx)
FR799756A (fr) 1936-06-19

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