US3504732A - Apparatus for continuously casting metals - Google Patents

Apparatus for continuously casting metals Download PDF

Info

Publication number
US3504732A
US3504732A US665616A US3504732DA US3504732A US 3504732 A US3504732 A US 3504732A US 665616 A US665616 A US 665616A US 3504732D A US3504732D A US 3504732DA US 3504732 A US3504732 A US 3504732A
Authority
US
United States
Prior art keywords
strand
rollers
hydraulic motor
pressure medium
mold
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
US665616A
Other languages
English (en)
Inventor
Alfred J Wertli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3504732A publication Critical patent/US3504732A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1284—Horizontal removing

Definitions

  • This invention relates to an apparatus for continuously casting metals. More particularly, this invention relates to an apparatus for continuously casting metal in a horizontal direction.
  • the drive for the rollers has been provided by electric motors or by electric motors having electro-magnetic clutches. These motors have generally been switched off after each forward stroke of the rollers and then switched on again to feed the strand further forward by one stroke.
  • relatively long time constants occur upon starting and braking of the motors or upon engagement and disengagement of the electro-magnetic clutches, only a relatively few strokes per minute, for example, less than 40, can be carried out.
  • the number of strokes per unit time should desirably be increased considerably over the above-exemplified number. Further, the stroke should be smaller than the smallest cross-sectional dimension of the strand being cast.
  • the invention provides a continuous casting apparatus for withdrawing a cast strand horizontally from a casting mold of a furnace in a series of intermittent strokes.
  • the apparatus includes at least one pair of gripping rollers for gripping the cast strand downstream of the mold, a hydraulic motor which is connected to at least one of the rollers to exert a rotary movement on the roller and a means for intermittently feeding a pressure medium to the hydraulic motor.
  • the motor Upon feeding of the pressure medium to the hydraulic motor, the motor causes the gripping rollers to rotate in a manner to advance the cast strand in a forward direction away from the mold.
  • the motor stops and correspondingly 3,504,732 Patented Apr. 7, 1970 stops the gripping rollers from advancing the cast strand.
  • FIG. 1 diagrammatically illustrates a continuous casting apparatus of the invention
  • FIG. 2 illustrates a graph of the movement of a cast strand as a function of time.
  • the continuous casting apparatus includes a furnace 1 containing a molten metal, at least one mold 2 disposed substantially horizontally near the base of the furnace 1, a cooling device 3 surrounding each mold 2 to cool the molten metal flowing through the mold 2 and a withdrawal unit 4 downstream of the mold 2.
  • the molten metal in the furnace 1 flows into the mold 2, is cooled in the mold 2 by the cooling device 3 to solidify, and leaves the mold 2 as a strand 6 in the direction indicated by the arrow 7.
  • the strand then passes through four pairs of gripping rollers which constitute the withdrawal unit 4 and passes onto a roller conveyor (not shown).
  • the gripping rollers of the withdrawal unit 4 are composed of upper clamping rollers 8 and lower rollers 9.
  • the upper rollers 8 are mounted so as to be pressed against the strand 6 towards the lower rollers 9 and released from the strand 6 in a manner not shown in detail, for example, by a suitable electric, hydraulic or pneumatic means.
  • the lower rollers 9 are operably connected to each other through an endless chain 10 which engages a suitable chain sprocket on each roller 9 and are driven through a shaft 11 connecting the foremost roller 9 to a gear 13 which is also coupled to a hydraulic motor 15 of known construction through a shaft 16.
  • the hydraulic motor 15 connects with a pressure medium feed pipe 12 at one end and a pressure medium discharge pipe 14 at the other end.
  • the gear 13 allows the use of a hydraulic motor having a number of revolutions which is, for example, 10 to 15 times higher than the lowest number of revolutions for driving the rollers and thus permits the dimensions of the motor to be made smaller.
  • the gear 13 can be omitted and the foremost lower roller 9 can be coupled directly to the hydraulic motor 15.
  • the pressure medium feed pipe 12 is supplied with pressure medium from a reservoir 18 by means of a pump 17 which draws the pressure medium from the reservoir 18.
  • the pump 17 feeds the pressure medium to the hydraulic motor 15 through a valve 19 and through a fiow regulator 20 which controls the quantity of pres sure medium fed to the hydraulic motor 15 under a pressure of, for example, 50 kp./sq. cm.
  • the pressure medium actuates the hydraulic motor 15 so as to rotate the motor shaft 16.
  • the rotation of the motor-shaft 16 causes rotation of the lower rollers 9 in a clockwise manner as viewed by way of the gear 13, shaft 11 and chain 10 transmission.
  • the upper clamping rollers 8 being simultaneously pressed against the strand 6, the strand 6 is moved in the direction indicated by the arrow 7.
  • the pressure medium flows through the discharge pipe 14 back into the reservoir 18.
  • valve 19 In order to move the cast strand in an intermittent manner, the valve 19 is periodically opened and closed by means of a rotatable cam 21 which is driven by a variable speed gear (not shown) and motor (not shown) The periodic opening and closing of the valve 19 effects the actuation of the hydraulic motor 15 by controlling the delivery of the pressure medium in the feed pipe 14 to the hydraulic motor 15.
  • the rotational speed of the cam 21 is varied.
  • different shaped cams are substituted for cam 21.
  • the cycle T which has a ratio B/R of period of movement to period of rest of 1:2 can be altered to have a period of movement to period of rest ratio B/ R of 3:1 as shown in dot-dash lines.
  • a magnetic valve operated by an electrical or electronic pulse generator can also be provided in place of the camcontrolled valve 19. With the aid of this impulse generator, the length of the cycle, the period of movement and the period of rest can likewise be varied in a simple manner.
  • each lower roller 9 or several or all of the lower rollers 9 can be driven separately by its own hydraulic motor.
  • any number of the upper roller 8 can be moditied to be driven. If several rollers are driven by their own motor, the motors are connected in parallel so as to increase the torque acting on the moving strand.
  • the time constant of the hydraulic motor when starting and braking is very small.
  • the use of such a motor for driving the rollers Withdrawing the strand makes it possible to cast a strand at considerably higher casting speed than hitherto, e.g., at 200 to 300 strokes per minute, each stroke of which has a length of only 1 to 20 mm.
  • the strand will thus have a very uniform and fine structure.
  • An apparatus for the continuous casting of metals comprising 4 a furnace for containing a molten metal,
  • said means for rotating said pair of gripping rollers to intermittently advance the cast strand away from said mold said means including a hydraulic motor operably connected to one of said pair of gripping rollers to rotate said one gripping roller upon actuation and means for intermittently feeding a pressure medium to .said hydraulic motor to actuate said hydraulic motor, said means for feeding a pressure medium including a regulator for varying the quantity of pressure medium fed to said hydraulic motor.
  • said means for feeding a pressure medium includes a valve for controlling the feeding of pressure medium to said hydrauiic motor and a means for periodically opening and closing said valve to correspondingly intermittently actuate. said hydraulic motor.
  • said means for periodically opening and closing said valve includes a rotatably mounted cam operatively connected to said valve for periodically opening and closing said valve upon rotation thereof.
  • said means for rotating further includes a gear operatively connected between said hydraulic motor and said one gripping roller for changing the gear ratio between said motor and said one gripping roller.
  • An apparatus as set forth in claim 1 which comprises a plurality of pairs of gripping rollers for gripping the cast strand and said means for rotating further includes an endless chain operatively connected to one roller of each of said pairs of gripping rollers for simultaneously rotating said rollers in response to rotation of said one roller through said hydraulic motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US665616A 1966-09-03 1967-09-05 Apparatus for continuously casting metals Expired - Lifetime US3504732A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1279466A CH437660A (de) 1966-09-03 1966-09-03 Anlage zum Stranggiessen von Metallen

Publications (1)

Publication Number Publication Date
US3504732A true US3504732A (en) 1970-04-07

Family

ID=4386464

Family Applications (1)

Application Number Title Priority Date Filing Date
US665616A Expired - Lifetime US3504732A (en) 1966-09-03 1967-09-05 Apparatus for continuously casting metals

Country Status (9)

Country Link
US (1) US3504732A (de)
AT (1) AT281327B (de)
BE (1) BE703296A (de)
CH (1) CH437660A (de)
DK (1) DK115147C (de)
ES (1) ES344542A1 (de)
GB (1) GB1140326A (de)
NL (1) NL6711569A (de)
SE (1) SE332877B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669176A (en) * 1968-09-21 1972-06-13 Siemens Ag Drive system for continuous casting plants
US3726333A (en) * 1971-07-07 1973-04-10 Gen Motors Corp Control of continuous casting operation
US4463796A (en) * 1982-03-11 1984-08-07 Korshunov Evgeny A Continuous metal casting method and plant for performing same
US4592408A (en) * 1983-02-28 1986-06-03 Manfred Haissig Device for horizontal continuous casting of metals and alloys

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117407C2 (de) * 1981-05-02 1984-12-13 Technica-Guss GmbH, 8700 Würzburg Verfahren und Vorrichtung zum Ausziehen des Stranges bei einer Horizontal-Stranggießanlage
DE102012224046A1 (de) 2012-12-20 2014-06-26 Sms Siemag Ag Fördervorrichtung und Verfahren zum Fördern eines Gießstrangs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667673A (en) * 1951-03-19 1954-02-02 Nat Lead Co Apparatus for casting metallic rod
FR1060910A (fr) * 1952-05-21 1954-04-07 Usinor Procédé et installation pour la coulée en continu de metaux et autres produits
US2938501A (en) * 1957-11-25 1960-05-31 Ibm Hydraulic drive and control apparatus
US3107404A (en) * 1960-04-26 1963-10-22 Electro Chimie Metal Cutting of continuous cast bars
FR1395479A (fr) * 1964-05-25 1965-04-09 Procédé et dispositif pour la coulée horizontale de métaux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667673A (en) * 1951-03-19 1954-02-02 Nat Lead Co Apparatus for casting metallic rod
FR1060910A (fr) * 1952-05-21 1954-04-07 Usinor Procédé et installation pour la coulée en continu de metaux et autres produits
US2938501A (en) * 1957-11-25 1960-05-31 Ibm Hydraulic drive and control apparatus
US3107404A (en) * 1960-04-26 1963-10-22 Electro Chimie Metal Cutting of continuous cast bars
FR1395479A (fr) * 1964-05-25 1965-04-09 Procédé et dispositif pour la coulée horizontale de métaux

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669176A (en) * 1968-09-21 1972-06-13 Siemens Ag Drive system for continuous casting plants
US3726333A (en) * 1971-07-07 1973-04-10 Gen Motors Corp Control of continuous casting operation
US4463796A (en) * 1982-03-11 1984-08-07 Korshunov Evgeny A Continuous metal casting method and plant for performing same
US4592408A (en) * 1983-02-28 1986-06-03 Manfred Haissig Device for horizontal continuous casting of metals and alloys

Also Published As

Publication number Publication date
ES344542A1 (es) 1968-10-16
DK115147C (da) 1978-01-16
SE332877B (de) 1971-02-22
BE703296A (de) 1968-02-29
DK115147B (da) 1969-09-08
CH437660A (de) 1967-06-15
AT281327B (de) 1970-05-11
NL6711569A (de) 1968-03-04
GB1140326A (en) 1969-01-15

Similar Documents

Publication Publication Date Title
US2173377A (en) Apparatus for casting metals
US3504732A (en) Apparatus for continuously casting metals
GB1278795A (en) Continuous casting machine
GB1561065A (en) Drawing straightening and cutting machine
US2763041A (en) Automatic casting apparatus
US3540523A (en) Apparatus for the continuous casting of metals
US2108080A (en) Method for casting metals
IT951129B (it) Apparecchio a rulli di comando per condurre pezzi in movimento parti colarmente in macchine per la cola ta continua di metalli
US3040397A (en) Continuous casting machine
DE1583611C3 (de) Vorrichtung zum absatzweisen Fördern eines metallischen Gießstranges
SE461845B (sv) Foerfarande och apparat foer utdragning av en gjutstraeng
US3748078A (en) Forming machine with web transport
US3945284A (en) Parting tool for severing traveling elongated material into predetermined lengths
WO1985001900A1 (en) Apparatus for horizontally and intermittently drawing out cast steel piece from horizontal mold of horizontal continuous casting machine
US2292266A (en) Slug casting apparatus and method
GB1441301A (en) Loose coiler
EP0536210A1 (de) Vorrichtung und verfahren zum stranggiessen und strangpressen.
US3901491A (en) Apparatus for cutting billets from a continuous cast strand
US873997A (en) Rolling-mill.
US2970591A (en) Cement handling apparatus
US3706337A (en) Force-balanced die casting apparatus
GB1358173A (en) Conduit cleaning apparatus
GB1306385A (de)
US3707343A (en) Machine for producing articles from a strip of extruded synthetic material
DE900545C (de) Maschine zum Einwickeln von Waren