EP3697549B1 - Procédé de fabrication d'un moyeu denté - Google Patents

Procédé de fabrication d'un moyeu denté Download PDF

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Publication number
EP3697549B1
EP3697549B1 EP17818107.9A EP17818107A EP3697549B1 EP 3697549 B1 EP3697549 B1 EP 3697549B1 EP 17818107 A EP17818107 A EP 17818107A EP 3697549 B1 EP3697549 B1 EP 3697549B1
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EP
European Patent Office
Prior art keywords
collar
die
sheet
cup
area
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
EP17818107.9A
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German (de)
English (en)
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EP3697549A1 (fr
Inventor
Tom RADLOFF
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.)
Fsm Motec GmbH
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Fsm Motec GmbH
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Filing date
Publication date
Application filed by Fsm Motec GmbH filed Critical Fsm Motec GmbH
Priority to SI201731377T priority Critical patent/SI3697549T1/sl
Publication of EP3697549A1 publication Critical patent/EP3697549A1/fr
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Publication of EP3697549B1 publication Critical patent/EP3697549B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/42—Making machine elements wheels; discs pulleys, e.g. cable pulleys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/261—Making other particular articles wheels or the like pulleys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/28—Making other particular articles wheels or the like gear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks

Definitions

  • the invention relates to a method for producing an internally toothed hub in a sheet metal blank made from thin sheet according to the preamble of claim 1.
  • the invention also relates to a method for producing an externally toothed hub in a sheet metal blank made from thin sheet according to the preamble of claim 2.
  • the invention relates to the production of an internally toothed hub for a positive shaft-hub connection.
  • a belt pulley with an internally toothed hub is preferably produced by several forming steps from a thin sheet with a thickness of less than 3 mm, in particular a thin sheet with an initial thickness of about 1.5 mm.
  • the form-fitting shaft-hub connection between the belt pulley and the shaft is realized by an additional internally broached disk, which is materially connected to the belt pulley using a complex and costly laser process.
  • the manufacture of this additional disc is also cost-intensive due to the fact that the interior is broached with a broach.
  • a method for producing a belt pulley with a hub area that runs essentially radially and a peripheral area that runs essentially axially and has external teeth In the method, a round sheet of metal is first preformed into a cup, on the peripheral area of which a bulge is formed, which subsequently forms a thickening of the material is flattened. To form the aforesaid curvature, the peripheral area of the cup is axially upset within an annular chamber, with the bulging of the peripheral area being limited by the annular chamber in the press ram, into which the peripheral area is retracted during upsetting.
  • the invention is based on the object of creating a method for producing an internally toothed or an externally toothed hub in a sheet metal blank made of thin sheet metal, which does not require any material removal and can also be carried out significantly more cost-effectively.
  • a disc is preferably used as the sheet metal blank, the initial thickness of which is less than 3 mm, preferably about 1.5 mm.
  • a cup-shaped depression with a preferably round bottom surface is produced in the sheet metal blank in several drawing stages by deep-drawing.
  • the deep-drawing is preferably carried out using molds, in particular a punch and a die. With each drawing stage, the die is slightly reduced in size to concentrate the material in the area of the floor towards the center of the floor. Due to the increase in thickness of the sheet metal blank in the area of the bottom surface, sufficient material is available to subsequently produce a collar of sufficient length and strength by means of collar drawing.
  • the base area or the diameter of the bowl-shaped depression is reduced to the final shape of the bowl, for example in 3 deep-drawing steps.
  • the bottom surface of the cup Prior to the collaring step, the bottom surface of the cup is pierced.
  • the so-called pilot hole for the subsequent collaring is preferably produced by means of a punching tool, the punching tool comprising a punch and a die with an opening which is aligned with the punch.
  • the punch punches the pre-hole in the sheet metal blank and dips into the opening of the die below.
  • the punched slug falls through the conically widening opening.
  • the flush to the inner surface of the cup-shaped indentation the attached die stabilizes the cup-shaped indentation during perforation.
  • the punch is guided in an upper part of the punching tool.
  • the subsequent collaring is a forming process in which collars are formed on sheet metal by tensile pressure.
  • collaring is part of the forming process of tension-compression forming. Starting from an initial thickness of the sheet metal blank of 1.5 mm, the collar has a wall thickness of around 1.2 mm after the collar has been drawn.
  • the collar is drawn using a deep-drawing tool, the deep-drawing tool comprising a drawing punch with a cylindrical section and a drawing die with a cylindrical passage.
  • the diameter of the cylindrical section corresponds to the inner diameter of the collar to be produced.
  • the diameter of the cylindrical passage in the die corresponds to the outside diameter of the jacket of the collar to be manufactured.
  • the outer surface of the collar is first stabilized.
  • a mold is brought into flush contact with the outer casing.
  • a matrix is introduced into the interior of the collar, which has the negative of the internal toothing to be produced.
  • the option of initially increasing the wall thickness of the collar either uniformly all around or only partially by applying axial forming forces has a beneficial effect on the amount of torque that can be transmitted in the shaft-hub connection.
  • the axial upsetting also allows material to be accumulated in the area of the base of the hub to be produced.
  • the collar diameter is reduced before the step of sheet metal forming. In this way, a (further) increase in wall thickness can be achieved in order to increase the torque that can be transmitted.
  • the Figures 1.1 to 1.10 show the different tools for carrying out the processing steps in a top view of the respective tool as well as along the cutting lines AA to QQ in the top views.
  • the left part of the sectional view are the upper and lower part of the tool in front and in the right part of the Sectional view shown after the processing step.
  • the circular sheet metal blank (1) is located between the upper and lower part of each tool.
  • the peripheral edge of the circular disc rests on a sheet metal holder (2) in all processing steps.
  • the Figures 1.1 to 1.3 illustrate the deep-drawing of a cup-shaped indentation, hereinafter also referred to as cup (3) for short, in the sheet metal blank (1).
  • cup (3) After all three drawing stages, the cup (3) has a round bottom surface (3.1) and a circumferential jacket (3.2) which connects the bottom surface (3.1) to the rest of the sheet metal blank (1).
  • the deep-drawing tools (4) used for deep-drawing in the three steps 1.1 to 1.3 each comprise a die (4.1) as the upper part and a punch (4.2) as the lower part.
  • the cup (3) is first drawn in order to provide sufficient material for the serrations to be produced later in the hub by thinning out the surrounding areas.
  • the size of the deep-drawing tool (4) is reduced.
  • the punch (4.2) and the diameter of the free space of the die (4.1) are compared to the deep-drawing tool (4).
  • the size of the deep-drawing tool (4) is reduced again.
  • the punch (4.2) and the diameter of the free space of the die (4.1) are compared to the deep-drawing tool (4). figure (1.2) reduced.
  • the three drawing stages result in an increase in the thickness of the sheet metal blank in the area of the bottom surface (3.1), so that sufficient material is available to produce a collar (1.2) of sufficient length and thickness.
  • Figure 1.4 shows the perforation of the bottom surface (3.1) of the bowl (3) before the collaring step ( Figure 1.5 ).
  • the perforation is carried out by means of a punching tool (5), the punching tool comprising a punch (5.1) guided in the upper part of the tool and, as the lower part of the tool, a die (5.2) with an opening (5.3) which is aligned with the vertical direction of movement of the punch (5.1).
  • the die (5.2) supports the cup (3) while the punch (5.1) punches a pilot hole (3.3) in the center of the bottom surface (3.1) of the cup (3).
  • Figure 1.5 shows the production of the collar (1.2) in the area of the pre-perforated bottom area (3.1) by means of collar drawing.
  • the collaring is carried out using a mold (6), the mold (6) comprising a punch (6.1) with a cylindrical section (6.2) and a die (6.3) with a cylindrical passage (6.4). From the right half of the sectional view it can be seen that after the collar has been drawn, the outside of the bottom surface (3.1) of the cup (3) on the cylindrical passage (6.4) of the die (6.3) and the inside of the bottom surface (3.1) of the cup (3) on the cylindrical section (6.2) of the stamp (6.1).
  • Figure 1.6 shows the optional step of reducing the longitudinal extension of the collar (1.2) by axial upsetting to material for forming a base area (1.3) of the hub to accumulate
  • the molding tool (7) comprises a two-part upper tool part (7.1) with an annular gap (7.2) in which an annular press die (7.3) is guided so that it can move back and forth.
  • the annular gap (7.2) accommodates the collar (1.2).
  • the annular gap (7.2) widens on the underside in order to form a cavity for forming the foot area (1.3) between the collar (1.2) and the rest of the sheet metal blank (1) together with the lower part of the tool designed as a punch (7.4).
  • the length of the ram (7.3) is dimensioned in such a way that the length of the collar (1.2) is reduced by about 30%.
  • Figure 1.7 shows an optional reduction of the diameter of the collar (1.2).
  • the mold (8) comprises a punch (8.1) with a cylindrical section (8.2) and a die (8.4) with a passage (8.5) with a cylindrical section (8.6).
  • the diameter of the collar (1.2) is reduced between the cylindrical section (8.2) of the punch (8.1) and the cylindrical section (8.6) of the passage (8.5) of the die (8.4).
  • the diameter of the cylindrical section (8.2), (8.6) of the punch (8.1) and passage (8.5) is smaller than the diameter of the collar (1.2) after the optional step of reducing the longitudinal extension ( Figure 1.6 ).
  • Figures 1.8 shows an optional shaping of the collar (1.2) and the foot area (1.3) of the hub to be produced.
  • Figure 1.9 shows an optional additional compression of the collar (1.2) and the final shaping of the foot area (1.3) of the collar (1.2).
  • the forming tool (9) has an annular press ram (9.1) which is displaceably guided in a cylindrical passage (9.2) of the die (9.3) in alignment with the collar (1.2).
  • the longitudinal extent of the collar (1.2) is again slightly reduced by means of the press die (9.1).
  • the foot area (1.3) between the die (9.3) and the lower part of the tool designed as a punch (9.4) is completely formed before the sheet metal blank (1) processed in this way is fed to the final step of sheet metal forming to form the internal teeth.
  • Figure 1.10 branches off the final step of sheet metal forming to produce the hub (10) with internal teeth (10.1).
  • the forming tool (11) for sheet metal forming comprises a mold (11.1) as the upper part of the tool, which rests against the outer surface of the collar (1.2) and its foot area (1.3).
  • the tool base includes a die (11.2) with a negative of the internal gearing.
  • the die (11.2) is partially in contact with the inner surface of the collar (1.2) before the sheet metal forming.
  • the collar (1.2) is compressed by means of a ring-shaped ram (11.3), which can be moved back and forth in the upper part of the tool, until the material in the area of the collar (1.2) is completely in the die (11.2) with the negative of the internal toothing and thereby forms the internal toothing within the hub (10) formed in this way.
  • the collar (1.2) is stabilized by a shape that fits flush against its inner surface, not its outer surface.
  • the collar (1.2) is placed in a ring-shaped die with a negative of the external teeth before the sheet metal forming, while the die is placed in the collar stabilized on the outside to produce the internal teeth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)

Claims (15)

  1. Procédé, destiné à fabriquer un moyeu (10), pourvu d'une denture interne (10.1) dans une découpe de tôle (1) en tôle mince, comprenant les étapes consistant à :
    - emboutir un renfoncement (3) en forme de cupule avec une surface de fond (3.1) ronde dans la découpe de tôle (1) en plusieurs étapes d'emboutissage, de telle sorte que l'épaisseur de la découpe de tôle (1) augmente dans la zone de la surface de fond (3.1),
    - fabriquer une collerette (1.2) dans la zone de la surface de fond (3.1) par voie d'emboutissage de collerettes,
    caractérisé par les étapes suivantes, consistant à :
    - stabiliser la collerette (1.2) par un moule (11.1) adjacent à fleur à l'enveloppe extérieure de celle-ci,
    - introduire une matrice (11.2) pourvue d'un négatif de la denture interne (10.1) dans la collerette (1.2) et
    - procéder à une déformation massive de tôle consécutive par refoulement axial de la collerette (1.2), jusqu'à ce que la matière dans la zone de la collerette (1.2) vienne se placer dans la matrice (11.2).
  2. Procédé, destiné à fabriquer un moyeu pourvu d'une denture extérieure dans une découpe de tôle (1) en tôle mince, comprenant les étapes consistant à :
    - emboutir un renfoncement (3) en forme de cupule avec une surface de fond (3.1) ronde dans la découpe de tôle (1) en plusieurs étapes d'emboutissage, de telle sorte que l'épaisseur de la découpe de tôle (1) augmente dans la zone de la surface de fond (3.1),
    - fabriquer une collerette (1.2) dans la zone de la surface de fond (3.1) par voie d'emboutissage de collerettes,
    caractérisé par les étapes suivantes, consistant à :
    - stabiliser la collerette (1.2) par un moule adjacent à fleur à la surface intérieure de celle-ci,
    - introduire la collerette dans une matrice de forme annulaire, pourvue d'un négatif de la denture extérieure et
    - procéder à une déformation massive de tôle consécutive par refoulement axial de la collerette (1.2), jusqu'à ce que la matière dans la zone de la collerette vienne se placer dans la matrice.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'en tant que découpe de tôle (1), l'on utilise un disque.
  4. Procédé selon la revendication 3, caractérisé en ce que le disque est conçu sous la forme d'une poulie.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que qu'avant la déformation, la tôle mince présente une épaisseur de moins de 3 mm.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on réalise l'emboutissage du renfoncement (3) en forme de cupule avec des outils d'emboutissage (4) qui comprennent chacun un poinçon (4. ·2) et une matrice (4.1).
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'à chaque passage d'emboutissage, l'on réduit la taille de l'outil d'emboutissage (4), par rapport au passage d'emboutissage précédent.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'à chaque passage d'emboutissage, l'on réduit le diamètre du renfoncement (3) en forme de cupule, par rapport au passage d'emboutissage précédent.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'avant l'étape de l'emboutissage de collerettes, l'on perfore la surface de fond (3.1) du renfoncement (3) en forme de cupule.
  10. Procédé selon la revendication 9, caractérisé en ce que la perforation s'effectue au moyen d'un outil de poinçonnage (5), l'outil de poinçonnage comprenant un poinçon (5.1) et une matrice (5.2), pourvue d'un orifice (5.3) qui est alignée sur le poinçon (5.1).
  11. Procédé selon la revendication 10, caractérisé en ce que pendant l'opération de perforation, la matrice (5.2) est adjacente à fleur à la surface intérieure du renfoncement (3) en forme de cupule.
  12. Procédé selon la revendication 10, caractérisé en ce que
    - l'emboutissage de collerettes s'effectue au moyen d'un outil de formage (6),
    - l'outil de formage (6) comprenant un poinçon (6.1) pourvu d'un segment (6.2) cylindrique et une matrice (6.3) pourvue d'un passage (6.4) cylindrique,
    - pendant l'emboutissage de collerettes, la face extérieure de la surface de fond (3.1) du renfoncement (3) en forme de cupule venant s'appuyer sur le passage (6.4) cylindrique et pendant l'emboutissage de collerettes, la face intérieure de la surface de fond (3.1) du renfoncement (3) en forme de cupule venant s'appuyer sur le segment (6.2) cylindrique.
  13. Procédé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la déformation massive de tôle s'effectue par refoulement axial, par voie d'introduction de forces de pression sur le bord frontal de la collerette (1.2).
  14. Procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce qu'avant l'étape de la déformation massive de tôle, l'on réduit l'extension longitudinale de la collerette (1.2) et / ou le diamètre de la collerette.
  15. Procédé selon la revendication 1, caractérisé en ce que l'on amène la denture interne (10.1) du moyeu (10) en engagement avec la denture extérieure (13.1) d'un arbre (13) .
EP17818107.9A 2017-10-18 2017-12-13 Procédé de fabrication d'un moyeu denté Active EP3697549B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201731377T SI3697549T1 (sl) 2017-10-18 2017-12-13 Postopek izdelave ozobljenega pesta

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017124338 2017-10-18
PCT/EP2017/082690 WO2019076473A1 (fr) 2017-10-18 2017-12-13 Procédé de fabrication d'un moyeu denté

Publications (2)

Publication Number Publication Date
EP3697549A1 EP3697549A1 (fr) 2020-08-26
EP3697549B1 true EP3697549B1 (fr) 2023-07-05

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EP17818107.9A Active EP3697549B1 (fr) 2017-10-18 2017-12-13 Procédé de fabrication d'un moyeu denté

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EP (1) EP3697549B1 (fr)
ES (1) ES2956760T3 (fr)
PL (1) PL3697549T3 (fr)
PT (1) PT3697549T (fr)
SI (1) SI3697549T1 (fr)
WO (1) WO2019076473A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110405071B (zh) * 2019-07-18 2024-05-28 南京飞锐技术有限公司 汽车翼子板精密快速翻边模
CN112453208B (zh) * 2020-10-23 2023-01-03 赛沃智造(上海)科技有限公司 一种新型喷油器座的多工位连续模和冲压方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2743240B2 (ja) * 1993-04-19 1998-04-22 株式会社ユタカ技研 内径スプライン成形方法
DE19632279C2 (de) 1996-08-09 1998-07-30 Fischer & Kaufmann Gmbh & Co K Verfahren zur Herstellung eines scheibenförmigen Teiles
JP2920515B2 (ja) * 1997-02-07 1999-07-19 株式会社久保田鉄工所 段状回転体の製造方法
DE10020176C2 (de) * 2000-04-25 2003-10-09 Fischer & Kaufmann Gmbh & Co K Verfahren zur Herstellung einer Scheibe mit einer verdickten Nabe durch Tiefziehen
JP3559784B2 (ja) * 2002-01-31 2004-09-02 株式会社カネミツ ボス部を有する板金製回転部材のスプラインとキー溝の形成方法
DE10344885B3 (de) * 2003-09-26 2005-01-13 Fischer & Kaufmann Gmbh & Co. Kg Verfahren zum Herstellen eines Werkstücks mit Nabe mittels einer Presse und Blechwerkstück

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PL3697549T3 (pl) 2023-12-11
PT3697549T (pt) 2023-09-27
SI3697549T1 (sl) 2023-09-29
WO2019076473A1 (fr) 2019-04-25
ES2956760T3 (es) 2023-12-27
EP3697549A1 (fr) 2020-08-26

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