WO2007128264A1 - Vorrichtung zum schmieden von buchsenartigen gegenständen sowie ein danach hergestelltes schmiedeteil - Google Patents
Vorrichtung zum schmieden von buchsenartigen gegenständen sowie ein danach hergestelltes schmiedeteil Download PDFInfo
- Publication number
- WO2007128264A1 WO2007128264A1 PCT/DE2007/000730 DE2007000730W WO2007128264A1 WO 2007128264 A1 WO2007128264 A1 WO 2007128264A1 DE 2007000730 W DE2007000730 W DE 2007000730W WO 2007128264 A1 WO2007128264 A1 WO 2007128264A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mandrel
- mold
- forging
- bush
- ring
- Prior art date
Links
Classifications
-
- 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
- B21K1/18—Making machine elements pistons or plungers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/03—Die mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- 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
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/02—Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles, e.g. to be deep-drawn or extruded
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49453—Pulley making
Definitions
- the invention relates to a device for forging bush-like objects, such as steel pistons, to a method for producing bush-like forgings and to a forging produced thereafter.
- Bush-like forgings such as pistons for internal combustion engines
- pistons for internal combustion engines are often made from iron alloys, especially steels. These are at least partially hot forged. A particularly common application of such bush-like parts is found in internal combustion engines. Such bushings are also common for a wide variety of other applications, so that the invention is in no way limited to the production of internal combustion engine pistons, although it will be explained in more detail below with the aid of pistons for internal combustion engines.
- pistons for internal combustion engines have been forged in two stages, the piston blank first being introduced into a pre-engraving and a semi-finished product being forged there, which is then forged in a subsequent step in a finished engraving.
- the device according to the invention makes it possible to obtain bush-like forgings of small wall thickness, with a long piston skirt with good mold filling capacity and a long tool life from pre-pressed parts in one forging step.
- a device according to the invention for forging bush-like parts has:
- An ejection device with: an upper ejector G for ejection through the upper mandrel C and a lower ejector H for ejection through the lower mandrel B
- Temperature control is a major concern when forming hot parts. It is important that the temperature of the hot-formed part is dissipated quickly and as evenly as possible in the tool, so that the new form is work hardened and the part is prevented from warping due to uncontrolled temperature stresses during cooling outside the form.
- it can be provided according to the invention to cool the inner mandrel B, which, owing to the fact that it has a large amount of material and is arranged inside the tool, tends to cool more slowly than the other tool components.
- cooling channels for cooling fluid such as liquids or gases, can be provided. Depending on the size ratios of the shape used and the heat capacity of the materials, cooling of this kind makes sense.
- a special feature of the invention lies in the interaction of the lifting and extending unit.
- the fact that a negative pull-out cone Alpha is provided in the engraving of the upper form dome C means that the forged part is safely lifted out of the tool.
- the lower ejector H which can be actuated by the clamping foot E, prevents the forging blank from sliding back into the forging mold. The interaction of the upper and lower ejector makes it possible to avoid deep ejector marks and shape distortions caused by one-sided force.
- the method according to the invention for forging bush-like forgings includes:
- the lower mandrel and the forged part located thereon are cooled after the shaping before opening the same.
- the upper ejector is preferably only actuated after the top dead center of the forming press, in which the device according to the invention is preferably used, which enables the finished workpiece to be removed safely.
- a typical bush-like forged part according to the invention for example made of 42CRMo4, precipitation-hardening steels, high-chromium steels, which is particularly suitable as an engine piston for internal combustion engines, has a shirt length between 60 mm and 160 mm and a wall thickness between 6 mm and 12 mm.
- the fact that the tool has a deep plunge engraving with minimal die inclination, a cooled inner area and reinforcement means that, surprisingly, the use of a second forging step for socket-like parts with a ratio of length to outer diameter in the order of 0.5 m: 1 can be avoided , which greatly reduces the manufacturing effort.
- FIG. 1a shows a view of a longitudinal section through an embodiment of a bush-like forged part produced with the forming tool of FIG. 2;
- FIG. 1b shows a view of a longitudinal section offset by 90 ° through the embodiment of a bush-like forged part produced with the forming tool of FIG. 2 according to FIG. 1a;
- Fig. 2 is an exploded view of a forming tool according to an embodiment of the invention
- Fig. 3 is a detailed view of a section through the mandrel of the forming tool of Fig. 2 and
- FIG. 4 shows a detailed view of a section through the upper mandrel of the forming tool of FIG. 2;
- FIG. 5 shows a process diagram of the forging process according to the invention.
- Fig. 6 shows the two steps in the deformation of the compact to the piston with a molding tool according to the invention.
- a piston 10 for internal combustion engines Such a piston for internal combustion engines made of 42CrMo4 steel has, for example, the following dimensions: the length of the piston skirt 14 is at least approximately 0.5 times the piston outer diameter approximately 135 mm. The thickness of the piston side wall 11 is in the range of approximately 1 / 6th of the piston outer diameter. In a typical engine piston for internal combustion engines made of 42CrMo4, the piston skirt length is 60 to 85 mm, the piston side wall thickness is 6 to 10 mm and the piston outer diameter is 115 to 140 mm.
- piston 10 for example as a piston 10 for ship engines or drive motors for energy generation systems, depending on the material, other dimensions are customary, as is known to the person skilled in the art in the respective field.
- the special wall thicknesses strongly depend on the material used and the tasks of the piston.
- a method according to the invention which is suitable for producing such a piston 10 is carried out in a mold of FIG. 2, as shown schematically in FIG. 6 with a molded part located therein in longitudinal section.
- the tool has an upper mandrel C, the special design of which greatly simplifies the forming of a blank in one step.
- 4 shows a cross section through the upper mandrel C.
- An upper ejector G can be extended through the upper mandrel C, which can remove a molded part located in the engraving.
- a negative die angle alpha in the engraving of the upper mandrel C for ejection by the ejector G after completion of the stroke can also be useful, the so-called extension angle.
- the lower tool of the forging mold which together with the upper mandrel forms the engraving for forging the bush-like part, is formed by the lower mandrel B and the outer mold ring A, between which the bush wall is shaped in the desired length and thickness.
- the lower form dome B is designed in such a way that it can be moved relative to the outer form ring A by a lower ejector H, which can be round but also shaped and can be actuated by the clamping foot E, and thus a removal of the forged part from the lower tool relieved by avoiding the forging blank sliding back.
- the combination of upper and lower ejector H, G reduces ejector marks in the molded part as well as forgings due to a good distribution of force during ejection.
- This reinforcement ring can be made of a different material than the molding tools themselves, since it does not have to meet the requirements for tool properties such as low abrasion etc. This means that a cheaper material can be used, so that only the outer form ring A and the two form mandrels C and B have to be exchanged when the tool is replaced, which considerably simplifies tool maintenance in a forging device.
- the ring-like mandrel holder F supports the circumference of the upper mandrel C and forms the upper part of the mold with it.
- the forging tool is closed by the clamping foot E, which supports the lower mandrel and enables the lower mandrel B to move by the ejector H running in it.
- a method according to the invention for forging a bush-like forged part proceeds as follows: A pre-compressed preform is delivered heated to the forming temperature by an automatic machine and placed in the open forging mold between the retracted upper mandrel C and lower mandrel B in the outer mold ring A. This is made possible when both ejectors are withdrawn. Then the mold is closed in a forging stroke, whereby the two mandrels are moved towards each other, the preform is pressed against the mold engraving walls and formed.
- the mold can be coated beforehand with mold release agents in a conventional manner, as they are known in the field in question and known to the expert.
- Gas pressures in the mold can be derived using standard ventilation measures, such as ventilation holes I, which also removes lubricants and their residues.
- ventilation holes I which also removes lubricants and their residues.
- the arrangement of the vent hole is in no way limited to the lower mandrel and can be varied according to the requirements, as is obvious to the person skilled in the art.
- the movable lifting and extracting units make it possible to precisely lift the forged part out of the tool, this being particularly promoted by a negative extension cone angle alpha in the engraving of the upper form dome C.
- mandrel cooling it must be used before the molded part is ejected in order to maintain the deformed geometry.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/299,549 US8302447B2 (en) | 2006-05-04 | 2007-04-24 | Device for forging bush-shaped objects and a forged part produced therewith |
MX2008014093A MX2008014093A (es) | 2006-05-04 | 2007-04-24 | Dispositivo para forjar objetos en forma de buje y una parte forjada producida con el mismo. |
BRPI0711305-6A BRPI0711305A2 (pt) | 2006-05-04 | 2007-04-24 | Dispositivo para forja de objetos do tipo bucha bem como uma peça forjada com ele produzida |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006020861A DE102006020861B4 (de) | 2006-05-04 | 2006-05-04 | Einstufiges Schmiedeverfahren und Vorrichtung zur Herstellung von buchsenartigen Schmiedeteilen |
DE102006020861.7 | 2006-05-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007128264A1 true WO2007128264A1 (de) | 2007-11-15 |
Family
ID=38372316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2007/000730 WO2007128264A1 (de) | 2006-05-04 | 2007-04-24 | Vorrichtung zum schmieden von buchsenartigen gegenständen sowie ein danach hergestelltes schmiedeteil |
Country Status (5)
Country | Link |
---|---|
US (1) | US8302447B2 (de) |
BR (1) | BRPI0711305A2 (de) |
DE (1) | DE102006020861B4 (de) |
MX (1) | MX2008014093A (de) |
WO (1) | WO2007128264A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8776569B2 (en) * | 2011-03-23 | 2014-07-15 | Cheng Uei Precision Industry Co., Ltd. | Forging mold |
DE102011078145A1 (de) | 2011-06-27 | 2012-12-27 | Mahle International Gmbh | Schmiedeverfahren zur Herstellung eines Kolbens bzw. Kolbenschafts |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4621514A (en) * | 1983-09-15 | 1986-11-11 | Robert Bosch Gmbh | Method of making an intermediate stage, intermediate blank for a dynamo electric machine commutator ring, and apparatus to carry out the method |
EP0220031A2 (de) * | 1985-10-16 | 1987-04-29 | Nippondenso Co., Ltd. | Schmiedeverfahren und -vorrichtung |
DE4109628A1 (de) * | 1990-07-12 | 1992-01-16 | Mahle Gmbh | Kolben mit verbrennungsmotoren mit geschmiedeten bereichen aus stahl |
JPH0441036A (ja) * | 1990-06-07 | 1992-02-12 | Kubota Corp | 頂部燃焼室付きピストンの成形方法 |
JP2000263178A (ja) * | 1999-03-16 | 2000-09-26 | Toto Ltd | 型鍛造方法及び型鍛造装置 |
US20030213277A1 (en) * | 1997-12-05 | 2003-11-20 | Yuichi Nagao | Forging die apparatus |
US7191633B1 (en) * | 2005-11-22 | 2007-03-20 | Honda Motor Co., Ltd. | Forging apparatus |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2195321A5 (de) | 1972-08-05 | 1974-03-01 | Klueber Lubrication | |
US4423617A (en) * | 1982-02-22 | 1984-01-03 | The Nippert Company | Method of making a male resistance welding electrode |
DE3310423C1 (de) * | 1983-03-23 | 1988-01-21 | Werner Dipl.-Ing. 3507 Baunatal Kaeseler | Verfahren und Vorrichtung zum Aufbereiten gebrauchter Punktschweisselektroden |
US4779444A (en) * | 1987-03-12 | 1988-10-25 | The National Machinery Company | Closed die forging machine |
JPH0685955B2 (ja) * | 1987-07-06 | 1994-11-02 | アイダエンジニアリング株式会社 | 閉塞鍛造装置 |
JPH0685956B2 (ja) * | 1987-07-06 | 1994-11-02 | アイダエンジニアリング株式会社 | 閉塞鍛造装置 |
DE3735446C1 (de) * | 1987-10-20 | 1989-03-23 | Werner Dipl-Ing Kaeseler | Umformwerkzeug und Verfahren zum Wiederaufbereiten von Punktschweisselektroden |
US5218853A (en) * | 1992-04-16 | 1993-06-15 | General Motors Corporation | Single-cycle closed die metal forging method |
WO1998047646A1 (fr) * | 1997-04-22 | 1998-10-29 | Komatsu Industries Corporation | Matrice a forger et procede de refoulage |
US6507999B1 (en) * | 1999-03-12 | 2003-01-21 | General Electric Company | Method of manufacturing internal combustion engine pistons |
JP4147704B2 (ja) * | 1999-10-21 | 2008-09-10 | 株式会社デンソー | スパークプラグ用主体金具の製造方法 |
DE10113629A1 (de) * | 2001-03-21 | 2002-10-02 | Thyssen Krupp Automotive Ag | Verfahren zur Herstellung von Kolben- bzw. Kolbenbauteilen sowie Schmiedewerkzeug |
DE10123745C2 (de) * | 2001-05-11 | 2003-07-03 | Hatebur Umformmaschinen Ag Rei | Hydraulisch-mechanische Schließvorrichtung, vorzugsweise zum Querfließpressen |
JP3936230B2 (ja) * | 2002-04-19 | 2007-06-27 | 日本特殊陶業株式会社 | フランジ付き筒状金具の製造方法 |
DE10230837B4 (de) * | 2002-07-05 | 2004-12-23 | Eifelwerk Heinrich Stein Gmbh & Co Kg | Vorrichtung zum Warmumformen |
DE10311150A1 (de) | 2003-03-14 | 2004-09-23 | Mahle Gmbh | Verfahren zur Herstellung eines geschmiedeten Kolbens für einen Verbrennungsmotor |
-
2006
- 2006-05-04 DE DE102006020861A patent/DE102006020861B4/de not_active Expired - Fee Related
-
2007
- 2007-04-24 US US12/299,549 patent/US8302447B2/en not_active Expired - Fee Related
- 2007-04-24 WO PCT/DE2007/000730 patent/WO2007128264A1/de active Application Filing
- 2007-04-24 BR BRPI0711305-6A patent/BRPI0711305A2/pt not_active Application Discontinuation
- 2007-04-24 MX MX2008014093A patent/MX2008014093A/es active IP Right Grant
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4621514A (en) * | 1983-09-15 | 1986-11-11 | Robert Bosch Gmbh | Method of making an intermediate stage, intermediate blank for a dynamo electric machine commutator ring, and apparatus to carry out the method |
EP0220031A2 (de) * | 1985-10-16 | 1987-04-29 | Nippondenso Co., Ltd. | Schmiedeverfahren und -vorrichtung |
JPH0441036A (ja) * | 1990-06-07 | 1992-02-12 | Kubota Corp | 頂部燃焼室付きピストンの成形方法 |
DE4109628A1 (de) * | 1990-07-12 | 1992-01-16 | Mahle Gmbh | Kolben mit verbrennungsmotoren mit geschmiedeten bereichen aus stahl |
US20030213277A1 (en) * | 1997-12-05 | 2003-11-20 | Yuichi Nagao | Forging die apparatus |
JP2000263178A (ja) * | 1999-03-16 | 2000-09-26 | Toto Ltd | 型鍛造方法及び型鍛造装置 |
US7191633B1 (en) * | 2005-11-22 | 2007-03-20 | Honda Motor Co., Ltd. | Forging apparatus |
Also Published As
Publication number | Publication date |
---|---|
MX2008014093A (es) | 2009-01-23 |
US20090301165A1 (en) | 2009-12-10 |
DE102006020861B4 (de) | 2010-08-26 |
US8302447B2 (en) | 2012-11-06 |
BRPI0711305A2 (pt) | 2011-11-22 |
DE102006020861A1 (de) | 2007-11-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2049315B1 (de) | Auswerferstift für eine werkzeugform sowie verfahren zum herstellen eines solchen auswerferstifts | |
DE60211496T2 (de) | Schmiedeverfahren und -vorrichtung | |
DE602005003751T2 (de) | Verfahren zum Erwärmen von Schmiedewerkzeugen in einer Schmiedemaschine und lösbares Ofenteil zum Erwärmen derselben | |
DE102012005106B4 (de) | Verfahren zur Herstellung einer Hohlwelle und Vorrichtung hierfür | |
DE2843742A1 (de) | Verfahren und vorrichtung zum abstrecken von behaeltern | |
DE102011015732A1 (de) | Fluid cooling during hot-blow-forming of metal sheets and tubes | |
DE3039707C2 (de) | ||
DE102005024908B4 (de) | Verfahren zur Herstellung eines Kegelrads | |
EP1948374B1 (de) | Dauergiessform und giessformeinsatz | |
DE102014101349A1 (de) | Umformwerkzeug mit Lochstempel | |
EP2738377A2 (de) | Verfahren zur Herstellung eines Zylinderkurbelgehäuses | |
WO2007128264A1 (de) | Vorrichtung zum schmieden von buchsenartigen gegenständen sowie ein danach hergestelltes schmiedeteil | |
DE102015215184B4 (de) | Werkzeug zur Wärmebehandlung von hinterschnittenen Bauteilen | |
JP2008229671A (ja) | 鍛造用金型装置 | |
DE102016105771A1 (de) | Verfahren zur Herstellung eines eine Nabe aufweisenden Formkörpers sowie Vorrichtung zur Durchführung des Verfahrens | |
DE19925029B4 (de) | Verfahren zum Umformen und Vorrichtung zur Durchführung des Verfahrens | |
WO2013121328A1 (de) | Umgeformtes buchsenartiges teil und verfahren sowie vorrichtung zu seiner herstellung | |
EP3221068B1 (de) | Verfahren zur herstellung eines rotationssymmetrischen formkörpers | |
DE102016122514A1 (de) | Feuerverschweißtes innengekühltes Ventil sowie Verfahren zur Herstellung | |
DE102021000614A1 (de) | Kokille zur rissfreien Herstellung eines Metallgegenstandes mit mindestens einem Hinterschnitt, insbesondere aus intermetallischen Legierungen wie TiAl, FeAl und anderen spröden oder rissanfälligen Werkstoffen, sowie ein entsprechendes Verfahren. | |
EP1657007B9 (de) | Verfahren zum Verformen von Werkstücken | |
EP0279012A1 (de) | Verfahren und Vorrichtung zur Herstellung eines Tellerventilkopfes | |
DE102009030600A1 (de) | Herstellungsverfahren von Rohrmaterial | |
DE2919337A1 (de) | Verfahren und vorrichtung zum warmpressen von pleuelkopf-lagerdeckeln | |
DE102017207431A1 (de) | Verfahren zur Herstellung eines Kolbenoberteils und/oder eines Kolbenunterteils für einen Kolben einer Brennkraftmaschine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07722288 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2008/014093 Country of ref document: MX |
|
WWE | Wipo information: entry into national phase |
Ref document number: 4744/KOLNP/2008 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12299549 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 07722288 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: PI0711305 Country of ref document: BR Kind code of ref document: A2 Effective date: 20081104 |