EP0096010A2 - Vorrichtung zur Wärmebehandlung von Raupenkettengliedern für Raupenfahrzeuge - Google Patents

Vorrichtung zur Wärmebehandlung von Raupenkettengliedern für Raupenfahrzeuge Download PDF

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Publication number
EP0096010A2
EP0096010A2 EP83830091A EP83830091A EP0096010A2 EP 0096010 A2 EP0096010 A2 EP 0096010A2 EP 83830091 A EP83830091 A EP 83830091A EP 83830091 A EP83830091 A EP 83830091A EP 0096010 A2 EP0096010 A2 EP 0096010A2
Authority
EP
European Patent Office
Prior art keywords
links
carrier
carriers
hooks
along
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.)
Granted
Application number
EP83830091A
Other languages
English (en)
French (fr)
Other versions
EP0096010A3 (en
EP0096010B1 (de
Inventor
Walter Grilli
Mauro Villani
Fulvio Rambaldi
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.)
Italtractor ITM SpA
Original Assignee
Italtractor ITM 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 Italtractor ITM SpA filed Critical Italtractor ITM SpA
Publication of EP0096010A2 publication Critical patent/EP0096010A2/de
Publication of EP0096010A3 publication Critical patent/EP0096010A3/en
Application granted granted Critical
Publication of EP0096010B1 publication Critical patent/EP0096010B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/53—Heating in fluidised beds
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0087—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for chains, for chain links

Definitions

  • the invention described herein relates to plant designed particularly for carrying out heat-treatment on the links used in crawler tracks.
  • the invention sets forth automatic means for carrying into effect a heat-treatment process for track-links already disclosed in an application for Italian patent n° 48934A/81.
  • the object of the invention described herein is that of providing plant capable of carrying out the process aforesaid in endless cycle, the links themselves undergoing treatment through a succession of stages by being carried along a production line by a simple and functional means of conveyance.
  • An advantage of the invention described herein is that it makes provision for recovery of the gases given off in the hardening furnace, with the end in view of their being utilised in the subsequent tempering stage furnace.
  • This and other advantages will be seen to be achieved by the invention, which relates to plant designed particularly for carrying out heat-treatment on crawler track links by means of a process in which the links -picked up from being forged and still at high temperature- undergo a succession of stages in the following sequence:
  • 1 denotes the press in which forging of the links 2 takes place, after which the links themselves are taken on to an infeed station 3 by a conveyor 4.
  • the single links are arranged -slung up, in fact- by an automatic loader 5 onto respective hooks 6 disposed in the appropriate direction for carrying out this said loading operation.
  • the single hooks 6 are fitted up to special carriers 7 in given number -8 per carrier, for instance- and each hook is able to turn about its own axis.
  • Each of the carriers 7 is provided with eight hollow supports 8 spaced apart at like distance one from the next and disposed on rectilinear and vertical axes, within which the cylindrical shanks 9 of the single hooks 6 are accommodated, coaxial therewith, and free to rotate therein.
  • the bent portion of the hook itself, denoted 10 extends downward from each respective hollow support 8 aforesaid.
  • the carrier 7 which tis to all intents and purposes a rectilinear bar, exhibits a cruciform cross- section throughout its rectilinear axial length, with the exception of the two ends 17, which are embodied cylindrically so as to enable both setting down and picking up of the carrier as a whole.
  • a loading-unit 13 provided with two prehensile elements 14 and 15, one following the other, is designed to carry through the following sequence of operations:
  • a contrivance fitted to loading-unit 13 which comprises a number of orienting devices 18, each designed to work a single hook 6 suspended from the carrier 7 beneath.
  • Each orienting device 18 comprises a shaft 20, this disposed with axis vertical and fitted at bottom with an eccentric pin 21 whose function is that of interacting with an angled appendage 22 offered by the uppermost part of each hook 6.
  • the shafts of each of the orienting devices 18 are interconnected in reciprocal fashion for the purposes of rotation by way of chains 23 which engage with sprockets 24.
  • Full carriers 7 are transferred forward by said conveyor 19 through the entire length of the cooling area 26, wherein the links ⁇ hanging from their individual hooks 6 on carrier 7- undergo a first cooling designed to bring about a moderate reduction in temperature to between 600 and 800° C.
  • Locking-on of the hooks suspended from a single carrier 7 so as to face in an established direction is brought about by causing slight axial movement of said bar 28 such that it moves up beside the flat face 30 offered by shank 9 -provision being made for a certain amount of clearance therebetween- said face 30 disposed parallel with bent portion 10 of the hook itself.
  • a lifting apparatus 32 which picks up the single carriers 7 from conveyor 19 and feeds them into the hardening furnace, which is a fluid-bed tunnel-type, denoted 33, and sets them down on a parallel-chain-pair conveyor 36, this extending longitudinally through both furnace 33 and the subsequent tempering furnace 35 -likewise a tunnel.
  • Carriers 7 are set down on the chains 36 in such a way that only links 2 and the lower end of hooks 6 will be totally submerged in the fluid 37.
  • the single carriers 7 are picked up by a first lifting unit 38 comprising two prehensile elements 39 and 40, these positioned such that one follows the other, of which element 39 lays hold on carrier 7 and draws it from the furnace 33, whereupon the entire lifting-unit 38 traverses in such a way as to bring the carrier thus picked up along to the quenching station 41.
  • Lifting-unit 38 is lowered once more in such a way that the links -still hanging from the hooks associated with this same carrier picked up and held by prehensile element 39- are lowered into the tank denoted 42, which contains the appropriate quenching liquid.
  • an actuator similar in all respects to actuator 31 unlocks hooks 6 by pushing forward on bar 28, and a further device 43 causes the hooks themselves, suspended from carrier 7, to turn about their own vertical axes.
  • Device 43 comprises a looped chain 44 disposed parallel with the carrier and designed to pair with the sprockets 45 fitted coaxially one to each hook 6 at the uppermost part of said cylindrical shank 9; the device itself being moved in toward said sprockets 45 by means of a hydraulic actuator cylinder 46. Being made thus to revolve while undergoing the quench, the single links are subjected to an even and balanced cooling on all their exposed surfaces.
  • lifting-unit 38 recedes one step, and the ends of the carrier are laid hold on by prehensile element 40 and lifted, whilst at the same, prehensile element 39 duly picks up and lifts another carrier exiting from the furnace 33 in similar fashion.
  • a further descent causes introduction of the carrier into the tempering furnace 35 and back onto the conveyor chains 36, and at the same moment, quenching of the carrier behind -this held by prehensile element 39- in tank 42.
  • furnace 35 is embodied such that only links 2 and the lower end of hooks 6 remain totally submerged in the fluid-bed, whilst hollow supports 8 and carrier 7 ride above the level thereof.
  • a lifting-unit 47 identical in all respects to unit 38 and provided with prehensile elements 48 and 49 likewise arranged such that one follows the other, picks up the single carrier from the furnace and brings it into the final cooling stat'ion 50.
  • a further actuator associated with lifting-unit 47 now releases hooks 6 by moving bar 28 in the appropriate axial direction, whilst a device 51 identical in all respects to device 43 aforementioned imparts rotation to the hooks 6, which duly turn about their own axes together with the links 2 suspended therefrom.
  • lifting-unit 47 recedes one step, whereupon carrier 7 is grasped by prehensile element 49 and lifted, and the two move forward to where carrier 7 itself is set down on one of the trolleys 12 aforesaid, after which lifting-unit 47 duly recedes one step and takes up the cycle as before.
  • Movement forward of the carriers along the entire length of the production line thus described is brought about in a step-by-step fashion, the tempo of which determining the various work time-lapses relative to loading-unit 13, lifting apparatus 32, and lifting-units 38 and 47.
  • the carrier is borne along the return stretch of conveyor-loop 11 aforementioned by trolley 12 as far as a discharge-point 52, where the single links are removed from their hooks automatically, emptying the carrier of its load.
  • Guides 53 are located at the discharge-point 52 which branch off from the direction of flow of the conveyor 11 itself, these serving to steer away the links 2 while hollow supports 8 continue on their way, held in the vertical by further guides. Thus one has the necessary removal of links 2 from the respective bent portions 10 of each carrier's hooks 6.
  • the plant thus described makes provision for recovery of the heat given off by gases produced in the first, hardening furnace 33, with the end in view of re-utilisation in the subsequent tempering- stage, carried out in tunnel 35.
  • the adoption of spray-quenching with the links 2 revolving about their own axes, and of the special fluid-bed heating technique, makes it possible to achieve a degree of surface-conditioning for the links themselves which will render further cleansing operations quite unnecessary.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP83830091A 1982-05-28 1983-05-04 Vorrichtung zur Wärmebehandlung von Raupenkettengliedern für Raupenfahrzeuge Expired EP0096010B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT40053/82A IT1157840B (it) 1982-05-28 1982-05-28 Impianto in particolare per il trattamento termico di maglie per cingoli
IT4005382 1982-05-28

Publications (3)

Publication Number Publication Date
EP0096010A2 true EP0096010A2 (de) 1983-12-07
EP0096010A3 EP0096010A3 (en) 1985-01-09
EP0096010B1 EP0096010B1 (de) 1988-08-17

Family

ID=11247257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83830091A Expired EP0096010B1 (de) 1982-05-28 1983-05-04 Vorrichtung zur Wärmebehandlung von Raupenkettengliedern für Raupenfahrzeuge

Country Status (4)

Country Link
EP (1) EP0096010B1 (de)
BR (1) BR8302380A (de)
DE (1) DE3377720D1 (de)
IT (1) IT1157840B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999049088A1 (en) * 1998-03-26 1999-09-30 Technomics, Inc. Fluidized-bed treatment process and apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR894014A (fr) * 1942-04-13 1944-12-12 Eisenwerke A G Deutsche Procédé et installation pour le traitement thermique d'éléments de chaînes-chenilles ou pièces analogues
US2852422A (en) * 1953-07-08 1958-09-16 Selas Corp Of America Method of heat treating metal objects
US3410594A (en) * 1967-03-28 1968-11-12 Kolene Corp Workpiece loading fixture
GB1499452A (en) * 1975-02-22 1978-02-01 Lubuskie Zaklady Termotech Elt Method for the heat treatment of cast iron and an equipment for the application of this method
EP0072355A1 (de) * 1981-07-21 1983-02-16 Italtractor Itm S.P.A. Verfahren zur Wärmebehandlung von Raupenkettengliedern für Traktoren oder Kettenfahrzeuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR894014A (fr) * 1942-04-13 1944-12-12 Eisenwerke A G Deutsche Procédé et installation pour le traitement thermique d'éléments de chaînes-chenilles ou pièces analogues
US2852422A (en) * 1953-07-08 1958-09-16 Selas Corp Of America Method of heat treating metal objects
US3410594A (en) * 1967-03-28 1968-11-12 Kolene Corp Workpiece loading fixture
GB1499452A (en) * 1975-02-22 1978-02-01 Lubuskie Zaklady Termotech Elt Method for the heat treatment of cast iron and an equipment for the application of this method
EP0072355A1 (de) * 1981-07-21 1983-02-16 Italtractor Itm S.P.A. Verfahren zur Wärmebehandlung von Raupenkettengliedern für Traktoren oder Kettenfahrzeuge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999049088A1 (en) * 1998-03-26 1999-09-30 Technomics, Inc. Fluidized-bed treatment process and apparatus
US6042369A (en) * 1998-03-26 2000-03-28 Technomics, Inc. Fluidized-bed heat-treatment process and apparatus for use in a manufacturing line

Also Published As

Publication number Publication date
IT8240053A0 (it) 1982-05-28
BR8302380A (pt) 1984-01-10
EP0096010A3 (en) 1985-01-09
DE3377720D1 (en) 1988-09-22
EP0096010B1 (de) 1988-08-17
IT1157840B (it) 1987-02-18
IT8240053A1 (it) 1983-11-28

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