EP0336862B1 - Method of making an outer chanfer on a cylindrical drawn piece - Google Patents
Method of making an outer chanfer on a cylindrical drawn piece Download PDFInfo
- Publication number
- EP0336862B1 EP0336862B1 EP89420120A EP89420120A EP0336862B1 EP 0336862 B1 EP0336862 B1 EP 0336862B1 EP 89420120 A EP89420120 A EP 89420120A EP 89420120 A EP89420120 A EP 89420120A EP 0336862 B1 EP0336862 B1 EP 0336862B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- die
- truncated cone
- shape
- chamfer
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 claims 1
- 238000010008 shearing Methods 0.000 claims 1
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 235000014510 cooky Nutrition 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- 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
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
Definitions
- the present invention relates to a method for producing an external chamfer on a stamped cylindrical part.
- Such an external chamfer is conventionally produced by a resumption in turning of the straight edge of the stamped part, this resumption being carried out by means of a tool which removes chips in sufficient quantity to produce the chamfer.
- the part to be obtained 1 is a cup whose bottom 5 is pierced with an orifice 2 for the passage of a drive shaft, and whose edge is provided with an external chamfer 3 This chamfer 3 is practically essential for carrying out the introduction of the cup 1 into an associated bore.
- FIGS 2 to 6 show the essential successive stages in the manufacture of the cup 1.
- the first operation is performed on a first station. It consists of cutting, in a very conventional manner between punch and die, a metal disc 4 of diameter much larger than that of the cup 3.
- This disc 4 is then transferred to another station, where is carried out, FIG. 3, a conical pre-stamping of this disc 4, the angle at the top ⁇ of the pre-stamping cone being equal to that of the chamfer to be obtained, while is provided , at the periphery of this stamped, a flat edge.
- the tool is shaped so that the small base 5 of the truncated cone 6 obtained has the same diameter as the bottom of the cup to be obtained, and that its flank or apothem 7 has a constant length L substantially equal to the height H (FIG. 1) of this cup.
- the part 6 is then transferred to another station, comprising a guillotine shears with circular periphery which axially cuts, in the vertical direction 8, the external periphery of the frustoconical stamp 6.
- the outer edge 9 of the stamped part 6 forms an angle equal to the above-mentioned value ⁇ with its flank or apothem 7.
- the stamp 6 is then transferred to a fourth station, where its side 7 is straightened axially, that is to say vertically: this side 7 then becomes circular cylindrical and perpendicular to the bottom 5 of the stamp.
- This side 7 is then provided with an external chamfer 3 of angle ⁇ , which is the result that we aim to obtain.
- the piece 6 obtained is then optionally passed through a calibration station, then is made, on a last station ( Figure 6), the central hole 2 for passage of the drive shaft of the cup.
- the tools used for cutting the disc 4 ( Figure 2) and for drilling the hole 2 ( Figure 6) are conventional tools operating as a cookie cutter. They are therefore not represented.
- FIG. 7 shows the tool used for stamping, according to FIG. 3, the frustoconical part 6 from the disc 4.
- This tool comprises a complementary punch 10 and a matrix 11, of frustoconical shape.
- a conventional sidewall press 12 comes to press strongly on the periphery of the disc 4 in order to maintain it during stamping, which prevents the material from wrinkling.
- an extraction pusher 24, pushed upwards by an axial spring 13, equips the die 11.
- FIG. 8 The tool allowing the axial sectioning, according to FIG. 4, of the periphery of the stamping 6, is represented in FIG. 8. It is a circular cutting tool comprising a circular cylindrical punch 14, an associated die 15, a press -wall 16, and an extraction pusher 17 pushed back by a spring 18.
- the tool used for straightening according to FIG. 5 is represented in FIG. 9. It comprises a beveled flank press 19, a circular cylindrical matrix, of diameter D equal to the external diameter of the cup 1 to be obtained, a pusher 21 with spring. 22, and a circular cylindrical punch 23, of diameter d equal to the inside diameter of the aforementioned cup 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Photoreceptors In Electrophotography (AREA)
- Metal Extraction Processes (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Processing Of Meat And Fish (AREA)
- Adornments (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
La présente invention se rapporte à un procédé de réalisation d'un chanfrein extérieur sur une pièce cylindrique emboutie.The present invention relates to a method for producing an external chamfer on a stamped cylindrical part.
Pour faciliter l'introduction d'une pièce cylindrique emboutie dans un alésage, il est nécessaire que cette pièce cylindrique ait un chanfrein sur tout son pourtour extérieur, sans quoi, l'introduction de la pièce dans son alésage associé peut être rendue impossible en raison d'irrégularités, aussi minimes soient-elles.To facilitate the introduction of a stamped cylindrical part into a bore, it is necessary that this cylindrical part has a chamfer all around its outer periphery, otherwise, the introduction of the part into its associated bore may be made impossible because irregularities, no matter how minor.
Un tel chanfrein extérieur est classiquement réalisé par une reprise en tournage de la tranche droite de la pièce emboutie, cette reprise étant effectuée au moyen d'un outil qui enlève des copeaux en quantité suffisante pour réaliser le chanfrein.Such an external chamfer is conventionally produced by a resumption in turning of the straight edge of the stamped part, this resumption being carried out by means of a tool which removes chips in sufficient quantity to produce the chamfer.
Cette solution traditionnelle est d'un prix de revient élevé. Il faut en effet insérer, dans la chaîne de fabrication, un poste de stockage des pièces embouties mais non encore chanfreinées, puis veiller à transférer ces pièces sur le tour pour y réaliser une opération d'enlèvement de métal. Il faut ensuite prévoir une opération particulière de nettoyage de ces mêmes pièces, de sorte que cette série d'interventions spéciales pénalise lourdement le prix de revient de chaque pièce. Une autre solution, selon le préambule de la revendication 1, est connue du document US-A- 2 611 475. D'après cet document, le chanfrein est réalisé par la rupture du materiau en tension.This traditional solution has a high cost price. It is indeed necessary to insert, in the production line, a storage station for stamped but not yet chamfered parts, then make sure to transfer these parts on the lathe to carry out a metal removal operation. It is then necessary to envisage a particular operation of cleaning of these same parts, so that this series of special interventions heavily penalizes the cost price of each part. Another solution, according to the preamble of claim 1, is known from document US-A-2 611 475. According to this document, the chamfer is produced by the rupture of the material in tension.
L'invention vise à remédier aux inconvénients des solutions antérieures. Elle se rapporte à cet effet à un procédé de réalisation d'un chanfrein extérieur sur une pièce cylindrique emboutie, ce procédé consistant, en partant d'une pièce métallique plane :
- à réaliser tout d'abord un préemboutissage conique de la pièce à obtenir, en utilisant un poinçon dont l'embout a une forme de tronc de cône d'angle substantiellement égal à celui du chanfrein à obtenir, avec ménagement d'un rebord périphérique plan,
- à sectionner ensuite axialement le pourtour extérieur de l'embout tronconique obtenu, par effet de cisaille-guillotine à coupe verticale par exemple,
- et à redresser ensuite, par un emboutissage final, la paroi latérale tronconique de cet embouti afin d'obtenir une coupelle à paroi coaxiale, le bord de cette coupelle étant alors muni d'un chanfrein extérieur.
- first of all to carry out a conical pre-stamping of the part to be obtained, using a punch whose end-piece has a truncated cone shape with an angle substantially equal to that of the chamfer to be obtained, with a flat peripheral rim ,
- then axially severing the outer periphery of the frustoconical end piece obtained, for example by vertical guillotine shears,
- and then straightening, by a final stamping, the frustoconical side wall of this stamping in order to obtain a cup with coaxial wall, the edge of this cup then being provided with an external chamfer.
L'invention sera bien comprise, et ses avantages ressortiront, au cours de la description suivante d'un exemple non limitatif de réalisation, en référence au dessin schématique annexé dans lequel :
- Figure 1 est une vue en perspective de la pièce à obtenir ;
- Figures 2 à 6 montrent les phases successives d'obtention de cette pièce par un procédé selon l'invention ;
- Figures 7 à 9 montrent les trois outils utilisés pour la mise en oeuvre de ce procédé, dans les trois phases successives essentielles d'exécution de ce procédé.
- Figure 1 is a perspective view of the part to be obtained;
- Figures 2 to 6 show the successive phases of obtaining this part by a method according to the invention;
- Figures 7 to 9 show the three tools used for the implementation of this process, in the three essential successive phases of execution of this process.
En se référant à la figure 1, la pièce à obtenir 1 est une coupelle dont le fond 5 est percé d'un orifice 2 pour le passage d'un arbre d'entraînement, et dont le bord est muni d'un chanfrein extérieur 3. Ce chanfrein 3 est pratiquement indispensable pour réaliser l'introduction de la coupelle 1 dans un alésage associé.Referring to Figure 1, the part to be obtained 1 is a cup whose
Les figures 2 à 6 montrent les phases successives essentielles de fabrication de la coupelle 1.Figures 2 to 6 show the essential successive stages in the manufacture of the cup 1.
La première opération, figure 2, est effectuée sur un premier poste. Elle consiste à découper, de manière très classique entre poinçon et matrice, un disque métallique 4 de diamètre nettement supérieur à celui de la coupelle 3.The first operation, Figure 2, is performed on a first station. It consists of cutting, in a very conventional manner between punch and die, a metal disc 4 of diameter much larger than that of the
Ce disque 4 est ensuite transféré vers un autre poste, où est réalisé, figure 3, un préemboutissage conique de ce disque 4, l'angle au sommet α du cône de préemboutissage étant égal à celui du chanfrein à obtenir, tandis qu'est ménagé, à la périphérie de ce préembouti, un rebord plan. L'outil est conformé pour que la petite base 5 du tronc de cône 6 obtenu ait le même diamètre que le fond de la coupelle à obtenir, et que son flanc ou apothème 7 ait une longueur constante L sensiblement égale à la hauteur H (figure 1) de cette coupelle.This disc 4 is then transferred to another station, where is carried out, FIG. 3, a conical pre-stamping of this disc 4, the angle at the top α of the pre-stamping cone being equal to that of the chamfer to be obtained, while is provided , at the periphery of this stamped, a flat edge. The tool is shaped so that the
La pièce 6 est alors transférée sur un autre poste, comportant une cisaille-guillotine à pourtour circulaire qui sectionne axialement, selon la direction verticale 8, le pourtour extérieur de l'embouti tronconique 6.The
Le résultat obtenu est représenté en vue partiellement agrandie sur la figure 4 : le bord extérieur 9 de l'embouti 6 forme un angle égal à la valeur α précitée avec son flanc ou apothème 7.The result obtained is shown in partially enlarged view in FIG. 4: the outer edge 9 of the stamped
L'embouti 6 est alors transféré sur un quatrième poste, où son flanc 7 est redressé axialement, c'est-à-dire à la verticale : ce flanc 7 devient alors cylindrique circulaire et perpendiculaire au fond 5 de l'embouti.The
Ce flanc 7 se trouve alors muni d'un chanfrein extérieur 3 d'angle α, ce qui est le résultat que l'on vise à obtenir.This
La pièce 6 obtenue est ensuite facultativement passée par un poste de calibrage, puis est réalisé, sur un dernier poste (figure 6), le trou central 2 de passage de l'arbre d'entraînement de la coupelle.The
Les outils utilisés pour la découpe du disque 4 (figure 2) et pour le perçage du trou 2 (figure 6) sont des outils classiques fonctionnant en emporte-pièce. Ils ne sont en conséquence pas représentés.The tools used for cutting the disc 4 (Figure 2) and for drilling the hole 2 (Figure 6) are conventional tools operating as a cookie cutter. They are therefore not represented.
La figure 7 montre l'outil utilisé pour l'emboutissage, selon figure 3, de la pièce tronconique 6 à partir du disque 4. Cet outil comporte un poinçon 10 et une matrice 11 complémentaires, de forme tronconique. Un presse-flanc classique 12 vient appuyer fortement sur le pourtour du disque 4 afin de le maintenir pendant l'emboutissage, ce qui évite à la matière de plisser. De manière classique également, un poussoir d'extraction 24, repoussé vers le haut par un ressort axial 13, équipe la matrice 11.FIG. 7 shows the tool used for stamping, according to FIG. 3, the
L'outil permettant le sectionnement axial, selon figure 4, du pourtour de l'embouti 6, est représenté figure 8. Il s'agit d'un outil de découpe circulaire comportant un poinçon cylindrique circulaire 14, une matrice associée 15, un presse-flanc 16, et un poussoir d'extraction 17 repoussé par un ressort 18.The tool allowing the axial sectioning, according to FIG. 4, of the periphery of the
L'outil utilisé pour le redressement selon figure 5 est représenté à la figure 9. Il comporte un presse-flanc biseauté 19, une matrice cylindrique circulaire, de diamètre D égal au diamètre extérieur de la coupelle 1 à obtenir, un poussoir 21 avec ressort 22, et un poinçon 23 cylindrique circulaire, de diamètre d égal au diamètre intérieur de la coupelle 1 précitée.The tool used for straightening according to FIG. 5 is represented in FIG. 9. It comprises a
Claims (4)
- A method of making an external chamfer (3) on a cylindrical shaped piece starting from a flat metal piece, characterised in that it comprises:- firstly making a conical preform (6) of the piece to be obtained, by using a punch (10), the end piece of which has the shape of a truncated cone of angle (a) substantially equal to that of the chamfer (3) to be obtained, which truncated cone extends into a plane peripheral edge;- then axially severing the rim of the truncated conical shape (6) obtained; and- trueing up the side wall (7) of this shape (6), which side wall is in the shape of a truncated cone, by final shaping, to obtain a core (1) with a coaxial wall, the edge of which has then been provided with an external chamfer (3).
- A method according to Claim 1, characterised in that the side or apothem (7) of the truncated cone (6) has a constant length approximately equal to the height (H) of the core (1) to be obtained, and that its small base (5) has a diameter equal to that of the bottom of the core (1).
- A method according to one of Claims 1 or 2, characterised in that the three stages of the method are carried out successively at three different stations, each comprising a punch and die tool, with a transfer operation each time from one station to the following station.
- A method according to Claim 3, characterised in that the first stage is effected by shaping between a punch (10) and a die (11) in the shape of a truncated cone, that the second stage is effected by a punch (14) and die (15) which produce a guillotine-shearing effect, and that the third stage is effected using a bevelled press surround (19) and a cylindrical punch (23) and die (20), the said punch (23) having a diameter (d) less than that (D) of the said die (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89420120T ATE81804T1 (en) | 1988-04-06 | 1989-03-31 | PROCESS FOR MANUFACTURING AN OUTER BEVEL ON A CYLINDRICAL DRAWING PART. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8804971A FR2629742B1 (en) | 1988-04-06 | 1988-04-06 | PROCESS FOR PRODUCING AN EXTERNAL CHAMFER ON A MOUTHPIECE |
| FR8804971 | 1988-04-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0336862A1 EP0336862A1 (en) | 1989-10-11 |
| EP0336862B1 true EP0336862B1 (en) | 1992-10-28 |
Family
ID=9365324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89420120A Expired - Lifetime EP0336862B1 (en) | 1988-04-06 | 1989-03-31 | Method of making an outer chanfer on a cylindrical drawn piece |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4910989A (en) |
| EP (1) | EP0336862B1 (en) |
| AT (1) | ATE81804T1 (en) |
| CA (1) | CA1289418C (en) |
| DE (1) | DE68903291T2 (en) |
| ES (1) | ES2035619T3 (en) |
| FR (1) | FR2629742B1 (en) |
| GR (1) | GR3006221T3 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2033153T3 (en) * | 1990-07-19 | 1993-03-01 | Degussa Aktiengesellschaft | MODIFIED SILICON DIOXIDE ON THE SURFACE. |
| US5755132A (en) * | 1996-02-26 | 1998-05-26 | Karl Marbach Gmbh & Co. | Punching and forming tool |
| EP0791414A1 (en) * | 1996-02-26 | 1997-08-27 | Karl Marbach GmbH + Co. | Stamping and forming tool |
| JP2009511377A (en) * | 2005-10-11 | 2009-03-19 | アイアン マウント コーポレーション | Container and method and apparatus for manufacturing the container |
| CN101628409B (en) * | 2008-07-15 | 2011-06-22 | 施俊兆 | Metal tool box forming method |
| CN102139436B (en) * | 2010-01-29 | 2013-08-14 | 江苏白雪电器股份有限公司 | Method for machining metal protective cover |
| CN102615184A (en) * | 2012-04-04 | 2012-08-01 | 无锡欧易博阀业科技有限公司 | Drawing die for disc-shaped workpiece |
| CN102974976A (en) * | 2012-11-15 | 2013-03-20 | 重庆黄龙机械制造有限公司 | Manufacture method for metal turnover box |
| CN104428102A (en) * | 2013-03-04 | 2015-03-18 | 丁玉武 | Car steel ring spoke production and manufacture process and specific mould thereof |
| CN104384844A (en) * | 2014-10-08 | 2015-03-04 | 柳州科尔特锻造机械有限公司 | Production technique for steel ring spoke of engineering machinery |
| CN111822942B (en) * | 2019-04-22 | 2022-04-29 | 安克创新科技股份有限公司 | Method for processing decorative net |
| CN112808858B (en) * | 2021-01-25 | 2022-11-15 | 重庆理工大学 | Progressive die for manufacturing spring arms |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US448748A (en) * | 1891-03-24 | Method of and machine for making cup-shaped articles | ||
| US161634A (en) * | 1875-04-06 | Improvement in methods of producing flanged lids and collars for sheet-metal cans | ||
| US2321085A (en) * | 1941-11-06 | 1943-06-08 | Electromaster Inc | Method for producing drawn cups with faced and beveled edges |
| US2415940A (en) * | 1944-10-05 | 1947-02-18 | Remington Arms Co Inc | Metal cupping process |
| US2611475A (en) * | 1948-10-07 | 1952-09-23 | Remington Arms Co Inc | Cup drawing apparatus |
| US3406554A (en) * | 1965-07-06 | 1968-10-22 | Continental Can Co | Apparatus for and method of forming containers |
| DE1932139A1 (en) * | 1969-06-25 | 1971-01-21 | Dynamit Nobel Ag | Deep drawing steel cartridge cases |
| SU590053A1 (en) * | 1976-05-10 | 1978-01-30 | Ижевский механический институт | Method of making annular articles |
| SU1016008A1 (en) * | 1980-07-14 | 1983-05-07 | Предприятие П/Я М-5344 | Method of producing hollow articles having bottom protrusion |
| US4534201A (en) * | 1982-12-29 | 1985-08-13 | American Can Company | Undercut punch to control ironing |
-
1988
- 1988-04-06 FR FR8804971A patent/FR2629742B1/en not_active Expired - Fee Related
-
1989
- 1989-03-30 CA CA000595247A patent/CA1289418C/en not_active Expired - Lifetime
- 1989-03-31 AT AT89420120T patent/ATE81804T1/en not_active IP Right Cessation
- 1989-03-31 EP EP89420120A patent/EP0336862B1/en not_active Expired - Lifetime
- 1989-03-31 ES ES198989420120T patent/ES2035619T3/en not_active Expired - Lifetime
- 1989-03-31 DE DE8989420120T patent/DE68903291T2/en not_active Expired - Fee Related
- 1989-04-03 US US07/332,564 patent/US4910989A/en not_active Expired - Fee Related
-
1992
- 1992-11-12 GR GR920402557T patent/GR3006221T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES2035619T3 (en) | 1993-04-16 |
| EP0336862A1 (en) | 1989-10-11 |
| DE68903291D1 (en) | 1992-12-03 |
| FR2629742B1 (en) | 1994-01-14 |
| FR2629742A1 (en) | 1989-10-13 |
| DE68903291T2 (en) | 1993-06-17 |
| CA1289418C (en) | 1991-09-24 |
| US4910989A (en) | 1990-03-27 |
| GR3006221T3 (en) | 1993-06-21 |
| ATE81804T1 (en) | 1992-11-15 |
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