EP3578910B1 - Halterungsvorrichtung eines werkstücks zur wärmebehandlung in vertikalen öfen - Google Patents

Halterungsvorrichtung eines werkstücks zur wärmebehandlung in vertikalen öfen Download PDF

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Publication number
EP3578910B1
EP3578910B1 EP19178252.3A EP19178252A EP3578910B1 EP 3578910 B1 EP3578910 B1 EP 3578910B1 EP 19178252 A EP19178252 A EP 19178252A EP 3578910 B1 EP3578910 B1 EP 3578910B1
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EP
European Patent Office
Prior art keywords
arm
yoke
hub
star
arms
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.)
Active
Application number
EP19178252.3A
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English (en)
French (fr)
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EP3578910A1 (de
Inventor
Ivan URBANEK
Jean Noel Amadasi
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.)
Cronite Cz SRO
Cronite CZ sro
Original Assignee
Cronite Cz SRO
Cronite CZ sro
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Publication of EP3578910A1 publication Critical patent/EP3578910A1/de
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Publication of EP3578910B1 publication Critical patent/EP3578910B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/005—Supports specially adapted for holding elongated articles in an upright position, e.g. sparking plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0056—Hangers

Definitions

  • the field of the invention is that of the design and manufacture of equipment for the heat treatment of metal parts.
  • the invention relates to a device for handling and holding a part during heat treatment in a vertical furnace.
  • the parts are held in position on holding devices which allow their handling for their entry into a furnace prior to the heat treatment, and their exit from the furnace after the heat treatment.
  • Such holding devices are widely used and comprise a lifting column and a star support integral with the lifting column.
  • the star-shaped support has arms, integral with a hub, on which the parts to be treated rest.
  • the lifting column also includes handling keys which make it possible, via ad-hoc means, to move the holding device.
  • the star supports are in one piece and formed by casting in a mold a liquid metallic material which hardens on cooling.
  • the star-shaped supports according to this first embodiment have high mechanical strength but remain bulky and cannot be repaired, or with difficulty, in particular in the event of premature wear or breakage of one of the arms.
  • star supports cannot be adapted according to different geometries of parts.
  • the cooling time can be long, which makes the manufacture of the holding devices both long and expensive.
  • the size of the molds can be large depending on the size of the star support to be manufactured. Consequently, a mold for the manufacture of a large-sized star support has a large size and weight, which makes it difficult to handle to the detriment of production rates and costs.
  • the arms are manufactured independently of the hub and then welded onto the latter to form the holding device.
  • the holding devices comprising one or more star-shaped supports according to this second embodiment have the advantage of being simpler to manufacture.
  • the assembly of the star support is then carried out by welding the arms to the hub.
  • star supports according to the first embodiment cannot be adapted to parts of different geometries.
  • the separation of the arms from the hub causes degradation of the arms and of the hub. Since the welding of the arms on the hub results from a fusion of material of the arms and of the hub, the separation which consists in removing the weld bead leads to a removal of material at least for the arms.
  • the detached arms are then unusable since their mechanical strength is reduced due to the shrinkage of material.
  • the object of the invention is in particular to provide a device for holding parts for heat treatment in a well-type furnace which overcomes the drawbacks of the prior art.
  • the object of the invention is to propose a holding device which is faster and less expensive to manufacture than those of the prior art.
  • Another objective of the invention is to provide such a holding device which can be adapted to different dimensions and geometries of parts.
  • Another objective of the invention is to provide such a device which is simple and quick to repair in the event of wear or breakage of the arms.
  • the manufacture of a holding device according to the invention is thus simplified. Indeed, the different parts of the device can be manufactured independently of each other, quickly, and their assembly is both simple and achievable in a short time.
  • connection between the arms and the hub is more efficient than in the prior art since the yokes allow better absorption of the mechanical forces on the arms.
  • each arm has a projecting lug intended to fit into a reserve of shape complementary to that of the lug, formed between the two lugs of the yoke.
  • the lug and the reserve together form a first locking in position of the arm relative to the hub.
  • the first blocking means are in the form of a slot made in the arm and the second blocking means are in the form of a hole made on the two ears of the yoke, the light and the bores being intended to face each other and to be traversed by a securing member.
  • the assembly and maintenance of the arms in position in the yokes can be carried out quickly and easily.
  • the slots and the bores are directly opposite one another, which all the more facilitates the insertion of the securing members.
  • the securing member is a pin intended to be fixed on one of the lugs of the yoke.
  • Such a member is simple to make and to use.
  • the pin is fixed to one of the ears by means of a ring welded to said ear.
  • the lifting column carries handling keys, the keys being advantageously removable with respect to the lifting column.
  • the keys make it possible, by ad-hoc means, to manipulate the part holding device. Furthermore, their independence from the lifting column makes it easier to mount one or more star-shaped supports on the lifting column.
  • each arm has an I-shaped cross section.
  • the I-shaped cross section ensures good mechanical resistance to stresses. Indeed, the arms thus better withstand the weight of the parts, especially when lifting the device loaded with the parts to be heat treated, the parts resting only on the arms of the star support.
  • the support comprises four arms regularly spaced from one another.
  • the device comprises two star supports superimposed on one another along the lifting column.
  • fixed is meant that the star support 3 is integral with the lifting column 2 in a reversible manner, that is to say that the star support 3 can be detached simply and quickly from the lifting column 2.
  • the lifting column 2, shown on figure 1 is in the form of a hollow metal tube extending along a first axis A1.
  • the column 2 has a slot 22 intended to receive the lifting key 4 (shown only on the figure 1 ), and at a lower end 23, opposite the upper end 21, at least six pins 24 on which the star support 3 is intended to rest.
  • the hub 31 comprises a central cylinder 311.
  • the central cylinder 311 has, at mid-height, an interior bead 312 which defines a first bearing surface 313 and a second bearing surface 314 intended to rest, one or the other on the pins 24 of the column. 2 lifting.
  • This bead 312 makes it possible in particular to be able to mount the support 3 in a star shape in one direction or the other, in a reversible manner, by turning it regularly. This makes it possible in particular to compensate for the deformations of the arms 32 resulting from the weight of the parts.
  • the star support 3 comprises four arms 32 extending outwardly from the hub 31 to form the star.
  • a star-shaped support 3 can in particular comprise up to nine arms 322.
  • the four arms 32 are regularly spaced from each other, in this case at 90 ° from each other.
  • the star-shaped support 3 also comprises yokes 34, for fixing the arms 32 on the hub 31.
  • each yoke 34 extends from the central cylinder 311 towards the outside of the support 3, and is spaced from the other yokes 34 by 90 ° in accordance with the arrangement of the arms 32 at 90 ° from each other.
  • each yoke 34 is formed by two lugs 341 extending outwardly from the hub 31.
  • the hub 31 thus comprises four yokes 34 in each of which an arm 32 is mounted.
  • Each yoke 34 has means for retaining the arms 32 on the hub 31.
  • the cylinder 311 of the hub 31 comprises in each yoke 34 a reserve 315 which forms an external cavity opening outwards from the hub 31, the cavity being located between the two ears 341 of the yoke 34.
  • the arms 32 as shown on figures 1 , 2 and 3 , have a section 10 in the form of 1 composed of an upper sole 321 and a lower sole 322 joined to each other by a central core 323.
  • the lugs 325 and the reserves 315 have a complementary shape so as to limit the play between the arm 32 and the hub 31 once the arm is mounted in a yoke 34.
  • each arm 32 also has first locking means 326 intended to cooperate with second locking means 342 (visible on the figure 1 ) integral with the yoke 34 in which the arm 32 is mounted, to block the arm 32 in translation along the second axis A2.
  • the first blocking means 326 are in the form of a slot formed in the arm 32, and more particularly in the core 323 of the arm 32, and the second blocking means 342 are in the form of a hole made on each ear 341 of the yoke 34 in which the arm 32 is inserted.
  • the light and the bores are thus intended to face each other and to be traversed by a member 33 for securing.
  • the lumen of the first blocking means 326 is formed in portions projecting on either side of the core 323.
  • the securing member 33 which passes through the lumen of the arm 32 and the holes in the yoke 34 are in the form of a pin intended to be fixed to one of the ears 341 of the yoke 34.
  • the pin has a cylindrical rod 331 and a head 332 having a diameter greater than that of the rod 331 so as to form an insertion stop for the securing member 33 in the slot and the bores.
  • the pin is fixed to one of the lugs 341 in particular by means of a ring 35 welded to said lug 341 and to the end of the cylindrical rod 331 of the securing member 33.
  • the securing member 33 therefore cannot be easily removed, unless the welding carried out is removed.
  • the holding device 1 according to the invention is assembled as follows.
  • the star-shaped support 3 is assembled by inserting an arm 32 into each yoke 34 so that the lug 325 of each arm 32 fits into the reserve 315 of each yoke 34.
  • a securing member 33 is inserted into the bore of a first lug 341 of the yoke 34 then into the lumen of the arm 32 and finally in the second bore of the second ear 341 of the yoke 34, then the ring 35 is inserted around the pin 331 and welded to the latter as well as to the yoke 34. This operation is carried out for each arm 32.
  • the rings 35 could be welded only to the pins so that in the event of replacement of an arm 32, the ring 35 and the pin are wearing parts replaced at each change of arm. 32.
  • the arms 32 When the arms 32 are mounted and the securing members 33 are welded, the arms 32 are blocked relative to the yokes 34, so that no translation and no rotation along the first axis A 1, the second axis A2 or the third axis A3 is not authorized.
  • the star support 3 When the star support 3 is fully constructed, it is inserted on a lifting column 2 so that the lifting column 2 passes through the cylinder 311 of the hub 31 until one of the bearing surfaces 313, 314 of the cylinder 311 comes to rest on each peg 24 of the lifting column 2.
  • the second star support 3 may have arms 32 having dimensions greater in length, that is to say along the axis of insertion of the arms 32 in the yokes 34, relative to the arms of the first star support 3. .
  • the two star-shaped supports 3 are separated by a spacer 30 as illustrated on the figure. figure 4 .
  • the handling key 4 is force-fitted in the slot 22 of the lifting column 2 so as to promote the assembly between the key 4 and the column 2.
  • the key 4 allows the holding device 1 to be gripped by an ad-hoc tool to be inserted or taken out of a well-type furnace for the heat treatment of a part.
  • the force-fitting allows the key 4 to hold properly in the slot 22 of the column 2, the key 4 however remaining removable with respect to the lifting column 2 to allow the addition or removal of supports 3 in a star shape.
  • the lifting column 2, the hub 31, and the arms 32, as well as the securing member 33, the rings 35 and the key 4 are made of metallic materials, preferably refractory steel, so as to allow their assembly by welding, their resistance to heat during the heat treatment of the parts in a furnace of the well type, and also so as to avoid any chemical reaction between the parts if they were made of different materials.
  • the holding device 1 according to the invention which has just been described has many advantages, including simplified manufacture and mechanical strength that is more efficient than the holding devices of the prior art.
  • the manufacture of the star-shaped support 3 from several assembled parts allows, on the one hand, a high production rate of the different parts by several different suppliers if necessary, and the assembly can be carried out simply and quickly by a technician.
  • This embodiment also allows simplified maintenance of the retaining devices 1 in that, if an arm 32 is damaged, it can be changed and replaced simply and quickly.
  • a new arm 32 is then inserted until the lug 325 of said arm 32 comes to be housed in the reserve 315 by interlocking, then the securing member 33 is reinserted into the holes in the yoke 34 and the light of the new one. arm 32, and finally, the ring 35 is re-welded to the securing member 33.
  • the device 1 also makes it possible to adapt to parts of different geometries. It is thus possible to propose a holding device 1 which comprises arms 32 of different lengths for the treatment of a first part and then dismantle some of the arms to provide a holding device 1 having identical arms 32 for the treatment of a second part. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
  • Furnace Charging Or Discharging (AREA)

Claims (10)

  1. Vorrichtung (1) zum Halten eines Werkstücks in Position für die Wärmebehandlung in einem Schachtofen, bestehend aus:
    - einer Hubsäule (2), die entlang einer ersten Achse (AI) verläuft;
    - mindestens einem sternförmigen Träger (3), der fest an der Hubsäule (2) montiert ist, wobei der sternförmige Träger (3) Folgendes umfasst:
    - eine Nabe (31), die auf der Säule (2) montiert ist;
    - mindestens drei Arme (32), die fest mit der Nabe (31) verbunden sind und sich von der Nabe (31) nach außen erstrecken, um einen Stern zu bilden, dadurch
    gekennzeichnet, dass:
    - die Nabe (31) für jeden Arm (32) einen aus zwei Laschen (341) gebildeten Gabelkopf (34) aufweist, der sich von der Nabe (31) nach außen erstreckt,
    - jeder Arm (32) Folgendes umfasst:
    - ein erstes Ende (324), das dazu bestimmt ist, entlang einer Einsteckachse (A2) in einen Gabelkopf (34) eingesteckt zu werden,
    - erste Sperrmittel (326), die dazu bestimmt sind, zusammen mit zweiten Sperrmitteln (342), die fest mit dem Gabelkopf (34) verbunden ist, das gesamte Spiel zwischen dem Gabelkopf (34) und dem Arm (32) zu beseitigen.
  2. Vorrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, dass das erste Ende (324) jedes Arms eine hervorstehende Nase (325) aufweist, die dazu bestimmt ist, in eine Aussparung (315) mit einer zu der Nase (325) komplementären Form, die zwischen den beiden Laschen (341) des Gabelkopfes (34) ausgebildet ist, eingesteckt zu werden.
  3. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ersten Sperrmittel (326) in Form einer Öffnung im Arm (32) und die zweiten Verriegelungsmittel (342) in Form eines Schlitzes an den beiden Laschen (341) des Gabelkopfes (34) ausgebildet sind, wobei der Schlitz und die Löcher dazu bestimmt sind, einander gegenüberzuliegen und von einem Befestigungselement (33) durchquert zu werden.
  4. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Befestigungselement (33) ein Stift ist, der dazu bestimmt ist, an einer der Laschen (341) des Gabelkopfs (34) befestigt zu werden.
  5. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass der Stift an einer der Laschen (341) mittels eines Rings (35) befestigt ist, der mit der genannten Lasche (341) verschweißt ist.
  6. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Hubsäule (2) mindestens einen Betätigungskeil (4) trägt.
  7. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass der Keil (4) von der Hubsäule (2) abgenommen werden kann.
  8. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Arm (32) einen I-förmigen Querschnitt aufweist.
  9. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Träger (3) vier Arme (32) aufweist, die in regelmäßigen Abständen voneinander angeordnet sind.
  10. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie zwei sternförmige Träger (3) aufweist, die entlang der Hubsäule (2) übereinander angeordnet sind.
EP19178252.3A 2018-06-07 2019-06-04 Halterungsvorrichtung eines werkstücks zur wärmebehandlung in vertikalen öfen Active EP3578910B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1800576A FR3082294B1 (fr) 2018-06-07 2018-06-07 Dispositif de maintien en position d'une piece pour traitement thermique pour fours verticaux

Publications (2)

Publication Number Publication Date
EP3578910A1 EP3578910A1 (de) 2019-12-11
EP3578910B1 true EP3578910B1 (de) 2021-10-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19178252.3A Active EP3578910B1 (de) 2018-06-07 2019-06-04 Halterungsvorrichtung eines werkstücks zur wärmebehandlung in vertikalen öfen

Country Status (2)

Country Link
EP (1) EP3578910B1 (de)
FR (1) FR3082294B1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954997A (en) * 1959-02-18 1960-10-04 Pacific Scientitic Company Load handling apparatus
FR1296324A (fr) * 1960-08-01 1962-06-15 Pacific Scientific Co Appareil pour la manutention de charges
CN201864458U (zh) * 2010-11-26 2011-06-15 青特集团有限公司 一种立式吊具
GB2497123A (en) * 2011-12-01 2013-06-05 Messier Dowty Ltd Support for use during heat treatment
CN106995874B (zh) * 2017-01-05 2018-06-01 西安航天动力机械厂 一种立式真空炉用自动吊挂工装

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Publication number Publication date
EP3578910A1 (de) 2019-12-11
FR3082294A1 (fr) 2019-12-13
FR3082294B1 (fr) 2020-05-29

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