EP0255740B1 - Antrieb für Ziehbänke - Google Patents

Antrieb für Ziehbänke Download PDF

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Publication number
EP0255740B1
EP0255740B1 EP87201277A EP87201277A EP0255740B1 EP 0255740 B1 EP0255740 B1 EP 0255740B1 EP 87201277 A EP87201277 A EP 87201277A EP 87201277 A EP87201277 A EP 87201277A EP 0255740 B1 EP0255740 B1 EP 0255740B1
Authority
EP
European Patent Office
Prior art keywords
drive unit
carriage
gear wheel
pinion
rack
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
EP87201277A
Other languages
English (en)
French (fr)
Other versions
EP0255740A1 (de
Inventor
Gianluigi Buglioni
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.)
DANIELI NATISONE SPA
Danieli and C Officine Meccaniche SpA
Original Assignee
DANIELI NATISONE SpA
Danieli and C Officine Meccaniche SpA
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 DANIELI NATISONE SpA, Danieli and C Officine Meccaniche SpA filed Critical DANIELI NATISONE SpA
Priority to AT87201277T priority Critical patent/ATE61950T1/de
Publication of EP0255740A1 publication Critical patent/EP0255740A1/de
Application granted granted Critical
Publication of EP0255740B1 publication Critical patent/EP0255740B1/de
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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive

Definitions

  • This invention concerns a drive unit for draw benches in accordance with the preamble of the main claim as is known for instance from GB-A-824056.
  • the drive unit is an assemblage of elements on the drawn benches which serves to provide the draw carriages with their to-and-fro movement and the necessary force.
  • the invention concerns the drive cams and the elements which transmit to the draw carriages their movement and the required force.
  • the drive cams consist of a drum-type cam having frontal contact between a path on the cam and a connecting roller.
  • a type of cam entails very considerable dimensions.
  • Such increase in power and in the sizes of the cams involve a plurality of appreciable problems.
  • a third general problem with this type of drive is connected with the transverse component which drum-type cams create with frontal paths.
  • US 2,126,453 discloses two coaxial cams with a circumferential action, which act on complex levers that act directly on the draw grippers.
  • US 2,234,728 is an improvement of US 2,126,453.
  • GB 2,018,658 discloses circumferential cams acting on levers, which in turn operate the draw grippers.
  • the invention enables simpler cams to be produced by employing a harder material (the known art now requires frontal cams to be made of cast steel, thus limiting the choices available).
  • the invention enables also a better balancing and equalising of the whole system to be obtained when the motion is inverted.
  • the invention enables a drive in an oil bath or with force feed lubrication to be obtained, together with the considerable advantages produced thereby.
  • the invention provides an open, radial cam, which is called tangential or harmonic in some quarters and comprises on its periphery a rolling path on which a roller presses.
  • Such roller is connected to a shaft which actuates by means of a first rack a pair of coaxial gear wheels solidly fixed together and having a preferred ratio to each other.
  • the gear wheel not engaged with the first rack acts on a second rack comprised on a draw carriage.
  • two gear wheels not engaged with the first rack may be provided so as to balance better the stress transmitted to the carriage.
  • such wheels may be associated in only one gear wheel.
  • the shaft acts on a lever, which may have one or two arms and is connected at its end to the carriage in such a way that it can oscillate.
  • roller is associated directly with the aforesaid lever.
  • Such lever performs the same functions as the system which comprises a first rack on the shaft, a pair of gear wheels and a second rack on the draw carriage.
  • the cam-roller-shaft-etc. system is normally duplicated so as to have one carriage moving forward in the drawing step, while there is another carriage in the return step, such carriages holding the coaxial drawing grippers.
  • the invention is therefore embodied with a drive unit for draw benches which is suitable to provide carriages bearing draw grippers with a required, coordinated to-and-fro movement, a radial cam cooperating with each carriage and pressing on a roller borne on a first shaft able to move axially with a first rack with which a pinion is engaged that is coaxial with and solidly fixed to a gearing-up gear wheel acting on a second rack included on the carriage, a desired preferred ratio existing between the pinion and the gear wheel, the pinion and gear wheel having an axis which is rotary but not displaceable.
  • a motor 10 is connected to a gearing-down unit 11 which transmits motion to a cam shaft 12.
  • a gearing-down unit 11 which transmits motion to a cam shaft 12.
  • two cams 13-113 are fitted to the cam shaft 12 and counterweights 29 are provided.
  • Such cams 13-113 may also be machined on the cam shaft 12 and be a part thereof.
  • the cams 13-113 are of a radial type, or tangential type as otherwise denominated, and the path on them for cooperation with rollers 14-114 respectively is located on their circumferential periphery. The result of this is that cooperation between path and roller is the best possible, without different and simultaneous instantaneous peripheral speeds.
  • rollers 14-114 cooperate with a first shaft 15-115 supported and guided axially by bearings 19 in the draw bench.
  • the first shaft 15-115 may comprise elements to prevent rotation and springs to keep the respective roller 14-114 pressed against its respective cam 13-113.
  • a first rack 16-116 is comprised on the shaft 15-115 and cooperates with a pinion 17-117, which is, or is caused to be, solidly fixed to a second shaft 23-123, to which a toothed wheel 18-118 is also solidly fixed.
  • the second shaft 23-123 may comprise two toothed wheels 18-118, which are respectively referenced with A and B.
  • a determined ratio, selected as required during design work and dimensioning, is established between the toothed wheel 18-118 and pinion 17-117.
  • a system to store and recover energy is comprised at the end of or in cooperation with the first shaft 15-115 and may be a mechanical system with a spring or a hydraulic or combined system.
  • the system to store and recover energy consists of a plunger 20 cooperating with a chamber 21, which in turn cooperates with a hydraulic storage reservoir 22.
  • the toothed wheel 18-118 (or the toothed wheels 18A-18B-118A-118B in the variant) cooperates with a second rack 25-125 comprised on a carriage 24-124 holding draw grippers 27 which act on rod 30 being drawn.
  • Means 28 to store and recover energy may be provided in cooperation with the draw carriages 24-124 and may consist, for instance, of springs or hydraulic means.
  • the whole assemblage is contained in a suitably formed box-wise structure 26, which enables the system to be lubricated plentifully without any loss or waste of oil.
  • the actuation assemblage may consist also of a lever, so that instead of the first rack 16, pinion 17, toothed wheel 18 and second rack 25 one lever may be provided in cooperation with the first shaft 15 and carriage 24 and be supported by the structure so as to be able to oscillate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Control Of Electric Motors In General (AREA)
  • Feedback Control In General (AREA)
  • Specific Conveyance Elements (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Pulleys (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (6)

  1. Steuersatz für Ziehbänke, der die die Schleppzangen (27) tragenden Schlitten (24) mit den gewünschten und abgestimmten Hin- und Herbewegungen versorgt und einen mit jedem Schlitten (24) durch ein Übersetzungsgetriebe (18) zusammenwirkenden Nocken (13) enthält, wobei das Übersetzungsgetriebe (18) auf eine im Schlitten (24) vorhandene Zahnstange (25) einwirkt und eine einzige drehende, jedoch nicht verschiebbare Achse aufweist, dadurch gekennzeichnet, daß der Nocken (13) radial und drehend ist und an einer Rolle (14) anliegt, wobei diese Rolle von einer ersten, mit einer anderen Zahnstange (16) axial bewegbaren Stange (15) getragen ist und ein Ritzel (17) in die obengenannte Zahnstange (16) eingreift, wobei das Ritzel (17) dem Übersetzungsgetriebe koaxial ist und mit demselben Übersetzungsgetriebe (18) fest verbunden ist und zwischen dem Ritzel (17) und dem Übersetzungsgetriebe (18) ein bestimmtes Vorzungverhältnis besteht.
  2. Steuersatz nach Anspruch 1, dadurch gekennzeichnet, das er zwei Überzetzungsgetriebe (18) aufweist, die auf weitere im Schlitten (24) vorhandene Zahnstangen (25) wirken.
  3. Steuersatz nach Anspruch 1 und 2, dadurch gekennzeichnet, daß Mittel zur Speicherung und Rückgewinnung der Energie vorhanden sind, die mit dem Schlitten (24) verbunden sind.
  4. Steuersatz nach Anspruch 1 und nach dem einen oder dem anderen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mittel zur Speicherung und Rückgewinnung der Energie mechanische Mittel (Federmittel) sind.
  5. Steuersatz nach Anspruch 1 und nach dem einen oder dem anderen der vorhergehenden Ansprüche bis 3, dadurch gekennzeichnet, daß die Mittel zur Speicherung und Rückgewinnung der Energie hydraulische Mittel sind.
  6. Steuersatz nach Anspruch 1 und nach dem einen oder dem anderen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mittel zur Speicherung und Rückgewinnung der Energie Luftfedern aufweisen.
EP87201277A 1986-08-06 1987-07-04 Antrieb für Ziehbänke Expired - Lifetime EP0255740B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87201277T ATE61950T1 (de) 1986-08-06 1987-07-04 Antrieb fuer ziehbaenke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT83391/86A IT1201802B (it) 1986-08-06 1986-08-06 Gruppo comando per banchi di trafilatura
IT8339186 1986-08-06

Publications (2)

Publication Number Publication Date
EP0255740A1 EP0255740A1 (de) 1988-02-10
EP0255740B1 true EP0255740B1 (de) 1991-03-27

Family

ID=11321189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201277A Expired - Lifetime EP0255740B1 (de) 1986-08-06 1987-07-04 Antrieb für Ziehbänke

Country Status (4)

Country Link
EP (1) EP0255740B1 (de)
AT (1) ATE61950T1 (de)
DE (1) DE3768875D1 (de)
IT (1) IT1201802B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1256093B (it) * 1992-11-04 1995-11-27 Gruppo di comando per carrelli di tiro,in particolare per banchi di trafilatura
US20060052194A1 (en) * 2004-09-03 2006-03-09 Gerring Douglas G Torsional force linear tensioner
CN112520833B (zh) * 2020-11-30 2021-08-31 鹤壁市质量技术监督检验测试中心 一种实验室污水中和装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE444479C (de) * 1926-03-28 1927-05-18 Wilhelm Helsper Rohrziehbank
US2126453A (en) * 1936-09-14 1938-08-09 William W Criley Apparatus for forming blanks from hot rolled wire stock
US2234728A (en) * 1939-07-12 1941-03-11 Ajax Mfg Co Feeding and straightening means
GB824056A (en) * 1957-07-18 1959-11-25 Fritz Singer A feeding mechanism, particularly for tube-stretching machines
DE1936139A1 (de) * 1969-07-16 1971-07-01 Schumag Schumacher Metallwerke Schlittenziehmaschine
DE2739812A1 (de) * 1977-09-03 1979-03-08 Forst Maschf Oswald Ziehmaschine
AT372312B (de) * 1978-02-13 1983-09-26 Mannesmann Ag Schlittenziehmaschine mit zwei in gleitbahnen am maschinenrahmen parallel zur ziehrichtung gefuehrten ziehschlitten

Also Published As

Publication number Publication date
IT8683391A0 (it) 1986-08-06
DE3768875D1 (de) 1991-05-02
IT1201802B (it) 1989-02-02
EP0255740A1 (de) 1988-02-10
ATE61950T1 (de) 1991-04-15

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