EP2106309B1 - Method for the production of a forged part, forged part, and forging die - Google Patents
Method for the production of a forged part, forged part, and forging die Download PDFInfo
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- EP2106309B1 EP2106309B1 EP07817679A EP07817679A EP2106309B1 EP 2106309 B1 EP2106309 B1 EP 2106309B1 EP 07817679 A EP07817679 A EP 07817679A EP 07817679 A EP07817679 A EP 07817679A EP 2106309 B1 EP2106309 B1 EP 2106309B1
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- Prior art keywords
- extension
- teeth
- forged
- forged part
- forging
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Classifications
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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
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
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- 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
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- 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
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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
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
Definitions
- the invention relates to a method for producing a forged part, in particular segment shaft, formed with a three teeth, one-sided, asymmetric extension and the forging produced thereon in particular segment shaft in a substantially elongated shape with a one-three teeth, unilateral asymmetric extension and the forging die for carrying out the method.
- the DE 32 35 115 A1 (HITACHI Ltd) refers to the production of flange shafts.
- the flanges are loaded only on their peripheral area to pressure - but there are no rising flanks, which are typical for teeth and subject to special loads.
- the degree of deformation for an asymmetric segment shaft is much higher and the load on the teeth is different.
- segment shafts with a one-sided extension with three or more teeth There are known segment shafts with a one-sided extension with three or more teeth. These segment waves are subject to a high load, especially on the flanks of the teeth. They are preferably installed in the motion train of a steering of commercial vehicles. Previous segments have been milled from solid material. However, this requires a high cycle time, high material consumption, and high tooling costs. In addition, the flanks do not have the required strength and must be reworked, e.g. hardened, become. The fiber course does not correspond to the ideal force curve.
- round material is extruded cross-sectionally on the face, so that the material flows transversely to the pressing direction into a one-sided extension.
- the Querf thoroughlygepresste blank is removed with lateral extension of the pressing tool and fed to a forging die, in which the blank is forged to a forging part to near final shape.
- the round material In order to apply lower pressing forces, the round material is heated before the transverse extrusion.
- the round material is easier to reshape, the fiber flow is better coherent.
- cross-extrusion the pressing movement is much slower than hammer-striking forging.
- the raw material is preferably rolled round steel, in particular coke-rolled round steel. This raw material advantageously leads to an end product with the required high strength.
- the forging is preferably standing, i. in the axial direction of the blank, forged in the gravitational direction.
- the weight of the forging hammer is thus exploited.
- the blank is hot forged in one stroke.
- the forging is machined with at least one extension at least at the end of the at least one extension.
- the excess material is preferably ground down to the final dimension. The fiber flow in the extension is not disturbed or broken and remains as desired.
- the forging is a segment shaft with three teeth as an asymmetrical extension.
- the segment shaft is intended for use in commercial vehicles, in particular in their steering systems.
- the highest forces and torques act on the tooth flanks of the middle tooth. Therefore, it is necessary that the fiber flow in the flanks of the tooth is formed particularly well parallel to the flanks. This is achieved by transverse extrusion of round stock and subsequent drop forging of the blank.
- the extension with due to the Querf diepressens parallel to the extension edge extending fiber profile leads to an increased, desired strength of the forged as a whole and the one-sided, asymmetrical extension.
- a break, upsetting or deflection of the fiber flow in the region of the extension are essentially absent.
- the extension of the forging preferably has at least one tooth, in particular three teeth, in order to advantageously obtain a forged part which can be used as a segment shaft in commercial vehicles.
- the central tooth of a segment shaft substantially has a fiber flow running parallel to the flank of the tooth. This leads to a very high strength of the most loaded tooth, especially in the flank area. It is thus achieved a long service life of the forging.
- the manufacturing costs, in particular the cycle time, are lower than in conventional machining production processes.
- the ends of the at least one extension, in particular of the teeth, are machined, preferably ground. As a result, disturbing burrs are removed due to the expansion joint of the forging die, whereby the favorable fiber progressions are retained.
- a forging die which has at least one expansion joint in engraving end extensions for receiving excess material, scale, lubricant, etc.
- the die according to the invention allows the fiber courses, which are favorably deformed in the transverse extrusion method, to exist, in particular at the end of the extensions, and further presses the fiber progressions or the fiber flow. A breaking, upsetting or deflection of the fiber flow on a gravure wall is essentially avoided due to the expansion joint at the corresponding engraving area. Excess material can escape into the expansion joint or expansion groove in the die.
- the Fig. 1 shows in a schematic cross-sectional view of a first process step for producing a forged part of a cylindrical round material 1.
- the round material 1 is coke-rolled round steel and has a fiber profile 2a, 2b parallel to the walls.
- press punches 5, 6 are arranged, which press the round material 1 in a first mold 7 transversely.
- the round material 1 is pressed by the lateral Querf capitapressen to a blank with a one-sided material accumulation in an extension 8.
- the first mold 7 has a one-sided engraving recess 9.
- the fiber profiles 2a, 2b also called fiber flow, which are seen in cross-section, extend in the direction of the extension 8 without being broken during the transverse extrusion molding.
- the round material is heated before the transverse extrusion, thus the pressing forces for the cross extrusion are low.
- the Fig. 2 shows in the radial cross-section of the resulting by the extrusion extrusion blank 10.
- the extension preform 8 is not yet clearly formed.
- the one-sided extension shape is achieved only by subsequent forging in a forging die and subsequent machining.
- the fiber courses 2a, 2b are nevertheless advantageously formed parallel to flanks of the extension 8 or they extend straight towards the extension end.
- the Fig. 3 shows the standing forged in the longitudinal direction of the blank 10 forging 11.
- the forged part 11 has in this embodiment, pronounced teeth 12, 13 and a hidden tooth 14 on.
- the forging 11 is forged in the forging very close to the final dimensions.
- the Fig. 4 shows in cross-section the forging die 15 with forged forging 11 in radial cross-section.
- an expansion joint or expansion groove 16 is formed in the engraving end extensions of the forging die 15.
- the expansion joints 16 serve to absorb excess material, scale, lubricant etc. during forging so that material can escape into the expansion joints and the fiber courses 2a, 2b are not broken. Continuous fiber progressions are particularly advantageous for a forged part 11 with high strength.
- the one-sided extension 8 on the forging 11 is, as in the Fig. 2 and 4 shown formed into three teeth 12, 13, 14.
- the center tooth 12 is exposed to particularly high loads when the forged part 11 is used as a segment shaft in commercial vehicles.
- the central tooth 12 has a fiber path 2 b running essentially parallel to the flank 20.
- the fiber flows to the flank 19 can be slightly oblique, since they are adjacent to the side edges of the extension 8.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Schmiedeteils, insbesondere Segmentwelle, mit einem zu drei Zähnen ausgebildeten, einseitigen, asymmetrischen Fortsatz sowie auf das danach hergestellte Schmiedeteil insbesondere Segmentwelle in einer im Wesentlichen länglichen Gestalt mit einem zu drei Zähnen ausgebildeten, einseitigen asymmetrischen Fortsatz und das Schmiedegesenk zur Durchführung des Verfahrens.The invention relates to a method for producing a forged part, in particular segment shaft, formed with a three teeth, one-sided, asymmetric extension and the forging produced thereon in particular segment shaft in a substantially elongated shape with a one-three teeth, unilateral asymmetric extension and the forging die for carrying out the method.
Die
Es sind Segmentwellen mit einem einseitig ausgebildeten Fortsatz mit drei oder mehr Zähnen bekannt. Diese Segmentwellen unterliegen einer hohen Belastung, insbesondere an den Flanken der Zähne. Sie werden bevorzugt im Bewegungsstrang einer Lenkung von Nutzfahrzeugen eingebaut. Bisherige Segmente sind aus vollem Material gefräst worden. Dies erfordert jedoch eine hohe Zykluszeit, hohen Materialverbrauch, sowie hohe Werkzeugkosten. Zudem weisen die Flanken nicht die erforderliche Festigkeit auf und müssen nachbearbeitet, z.B. gehärtet, werden. Der Faserverlauf entspricht nicht dem idealen Kraftverlauf.There are known segment shafts with a one-sided extension with three or more teeth. These segment waves are subject to a high load, especially on the flanks of the teeth. They are preferably installed in the motion train of a steering of commercial vehicles. Previous segments have been milled from solid material. However, this requires a high cycle time, high material consumption, and high tooling costs. In addition, the flanks do not have the required strength and must be reworked, e.g. hardened, become. The fiber course does not correspond to the ideal force curve.
Es ist Aufgabe der vorliegenden Erfindung, ein einfacheres Verfahren zur Herstellung eines Schmiedeteils, ein Schmiedeteil und ein Schmiedegesenk dafür zu schaffen, das den Festigkeitsanforderungen einer Segmentwelle genügt.It is an object of the present invention to provide a simpler method for producing a forged part, a forging part and a forging die which satisfies the strength requirements of a segment shaft.
Die Aufgabe wird durch ein Verfahren mit den Merkmalen des Patentanspruches 1 ein Schmiedeteil mit den Merkmalen des Patentanspruches 8 sowie ein Schmiedegesenk mit den Merkmalen des Patentanspruches 10 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Ansprüchen.The object is achieved by a method having the features of claim 1 a forging with the features of
Es wird Rundmaterial zu einem Rohling mit einer einseitigen Materialansammlung durch seitliches Querfließpressen in einer ersten Form gepresst und anschließend in einem Schmiedegesenk geschmiedet. Die Kombination des Umformens von Querfließpressen und Schmieden führt zu einem Schmiedeteil mit minimalster Bearbeitungszugabe. Außerdem wird ein günstiger Faserverlauf am einseitigen Fortsatz quer zur Erstreckungsrichtung der Welle erzeugt, der zu einer hohen Festigkeit des Schmiedeteils führt. Ein gebrochener, umgelenkter oder durch Zerspanen geteilter Faserverlauf würde die Festigkeit des Bauteils erheblich senken.It is pressed round material to a blank with a one-sided material accumulation by lateral cross extrusion in a first mold and then forged in a forging sink. The combination of forming of cross extrusion presses and forging leads to a forging with minimal machining allowance. In addition, a favorable fiber profile is generated on the one-sided extension transversely to the direction of extension of the shaft, which leads to a high strength of the forging. A broken, deflected or split by machining fiber flow would significantly reduce the strength of the component.
In einer Presse wird Rundmaterial stirnseitig querfließgepresst, so dass das Material quer zur Pressrichtung in einen einseitigen Fortsatz fließt. Anschließend wird der querfließgepresste Rohling mit seitlichem Fortsatz aus dem Presswerkzeug entnommen und einem Schmiedegesenk zugeführt, in dem der Rohling zu einem Schmiedeteil auf nahezu Endform geschmiedet wird.In a press, round material is extruded cross-sectionally on the face, so that the material flows transversely to the pressing direction into a one-sided extension. Subsequently, the Querfließgepresste blank is removed with lateral extension of the pressing tool and fed to a forging die, in which the blank is forged to a forging part to near final shape.
Um geringere Presskräfte aufbringen zu müssen, wird das Rundmaterial vor dem Querfließpressen erwärmt. Das Rundmaterial lässt sich leichter umformen, der Faserverlauf bleibt besser zusammenhängend. Beim Querfließpressen ist die Pressbewegung deutlich langsamer als beim hammerschlagartigen Schmieden.In order to apply lower pressing forces, the round material is heated before the transverse extrusion. The round material is easier to reshape, the fiber flow is better coherent. In cross-extrusion, the pressing movement is much slower than hammer-striking forging.
Es ist überraschenderweise herausgefunden worden, dass, wenn der Rohling in ein Schmiedegesenk mit mindestens einem Gravurendfortsatz mit zumindest einer Dehnfuge gepresst wird, der Faserverlauf in einem Schmiedeteil sehr gut erhalten bleibt. Eine Umlenkung, Stauchung oder Bruch des Faserverlaufs im Bereich des einseitigen Fortsatzes am Schmiedeteil wird vermieden. Die Festigkeit des Schmiedeteils insbesondere an den Flanken des mit hohen Kräften beanspruchten Fortsatzes wird weiter erhöht. Aufgrund der mindestens einen Dehnfuge am Ende des Gravurfortsatzes kann überschüssiges Material, Zunder, Schmiermittel etc. ausweichen. Hat der Gravurfortsatz mehrere Enden, wie z.B. für Zähne, so ist an jedem Zahnende eine Dehnfuge ausgebildet.It has surprisingly been found that when the blank is pressed into a forging die with at least one engraving extension having at least one expansion joint, the fiber flow in a forging is very well preserved. A deflection, compression or breakage of the fiber flow in the region of the one-sided extension on the forging is avoided. The strength of the forged part, in particular on the flanks of the claimed with high forces extension is further increased. Due to the at least one expansion joint at the end of the engraving extension excess material, scale, lubricant, etc. can escape. If the engraving extension has several ends, e.g. For teeth, an expansion joint is formed at each tooth end.
Bevorzugt ist das Rohmaterial gewalzter Rundstahl, insbesondere koksgewalzter Rundstahl. Dieses Rohmaterial führt vorteilhafterweise zu einem Endprodukt mit der erforderlichen hohen Festigkeit.The raw material is preferably rolled round steel, in particular coke-rolled round steel. This raw material advantageously leads to an end product with the required high strength.
Um ausreichende Schmiedekräfte aufzubringen, wird das Schmiedeteil bevorzugt stehend, d.h. in Achsrichtung des Rohlings, in der Gravitationsrichtung geschmiedet. Die Gewichtskraft des Schmiedehammers wird somit ausgenutzt.In order to apply sufficient forging forces, the forging is preferably standing, i. in the axial direction of the blank, forged in the gravitational direction. The weight of the forging hammer is thus exploited.
Bevorzugt wird, um eine möglichste geringe Zykluszeit, sowie Maschinenzeit pro Schmiedteil zu haben, der Rohling in einem Hub warm geschmiedet.Preferably, in order to have the shortest possible cycle time, as well as machine time per forging, the blank is hot forged in one stroke.
Um das Schmiedeteil in ein Fertigprodukt überzuführen, wird das Schmiedeteil mit mindestens einem Fortsatz zumindest an dem Ende des mindestens einen Fortsatzes spanend bearbeitet. Der Materialüberschuss wird bevorzugt auf das Endmaß abgeschliffen. Der Faserverlauf im Fortsatz wird dadurch nicht gestört bzw. gebrochen und bleibt, wie erwünscht erhalten.To convert the forging into a finished product, the forging is machined with at least one extension at least at the end of the at least one extension. The excess material is preferably ground down to the final dimension. The fiber flow in the extension is not disturbed or broken and remains as desired.
Bei einer bevorzugten Ausführungsform ist das Schmiedeteil eine Segmentwelle mit drei Zähnen als asymmetrischer Fortsatz. Die Segmentwelle ist für den Einsatz in Nutzfahrzeugen, insbesondere in deren Lenksystemen, vorgesehen. Auf die Zahnflanken des mittleren Zahns wirken die höchsten Kräfte und Drehmomente. Deshalb ist es erforderlich, dass der Faserverlauf in den Flanken des Zahns besonders gut parallel zu den Flanken ausgebildet ist. Dies wird durch Querfließpressen von Rundmaterial und anschließendes Gesenkschmieden des Rohlings erreicht.In a preferred embodiment, the forging is a segment shaft with three teeth as an asymmetrical extension. The segment shaft is intended for use in commercial vehicles, in particular in their steering systems. The highest forces and torques act on the tooth flanks of the middle tooth. Therefore, it is necessary that the fiber flow in the flanks of the tooth is formed particularly well parallel to the flanks. This is achieved by transverse extrusion of round stock and subsequent drop forging of the blank.
Es wird ein Schmiedeteil in einer im Wesentlichen länglichen Gestalt mit mindestens einem einseitigen Fortsatz aus gewalztem Rundstahl, insbesondere koksgewalztem Rundstahl, bevorzugt nach dem oben beschriebenen Verfahren, hergestellt, wobei ein Faserverlauf im Schmiedeteil parallel zur Flanke des mindestens einen Fortsatzes ausgebildet ist. Der Fortsatz mit aufgrund des Querfließpressens parallel zur Fortsatzflanke verlaufendem Faserverlauf führt zu einer erhöhten, erwünschten Festigkeit des Schmiedeteils insgesamt und am einseitigen, asymmetrischen Fortsatz. Ein Bruch, Stauchen oder Umlenkung des Faserverlaufs im Bereich des Fortsatzes sind im Wesentlichen nicht vorhanden.It is a forged part in a substantially elongated shape with at least one unilateral extension of rolled round steel, in particular Koksgewalztem round steel, preferably produced by the method described above, wherein a fiber flow is formed in the forging parallel to the flank of the at least one extension. The extension with due to the Querfließpressens parallel to the extension edge extending fiber profile leads to an increased, desired strength of the forged as a whole and the one-sided, asymmetrical extension. A break, upsetting or deflection of the fiber flow in the region of the extension are essentially absent.
Der Fortsatz des Schmiedeteils weist bevorzugt mindestens einen Zahn auf, insbesondere drei Zähne, um vorteilhafterweise ein Schmiedeteil zu erhalten, das als Segmentwelle in Nutzfahrzeugen einsetzbar ist.The extension of the forging preferably has at least one tooth, in particular three teeth, in order to advantageously obtain a forged part which can be used as a segment shaft in commercial vehicles.
Vorteilhafterweise weist besonders der mittlere Zahn einer Segmentwelle im Wesentlichen einen parallel zur Flanke des Zahns verlaufenden Faserfluss auf. Dies führt zu einer sehr hohen Festigkeit des meistbelasteten Zahns, insbesondere im Flankenbereich. Es wird somit eine hohe Lebensdauer des Schmiedeteils erzielt. Die Herstellungskosten insbesondere die Zykluszeit sind niedriger als bei herkömmlichen zerspanenden Herstellungsverfahren.Advantageously, especially the central tooth of a segment shaft substantially has a fiber flow running parallel to the flank of the tooth. This leads to a very high strength of the most loaded tooth, especially in the flank area. It is thus achieved a long service life of the forging. The manufacturing costs, in particular the cycle time, are lower than in conventional machining production processes.
Die Enden des mindestens einen Fortsatzes, insbesondere der Zähne, sind spanend bearbeitet, vorzugsweise geschliffen. Dadurch werden störende Grate aufgrund der Dehnfuge des Schmiedegesenks entfernt, wobei die günstigen Faserverläufe erhalten bleiben.The ends of the at least one extension, in particular of the teeth, are machined, preferably ground. As a result, disturbing burrs are removed due to the expansion joint of the forging die, whereby the favorable fiber progressions are retained.
Für das oben beschriebenen Schmiedeverfahren eignet sich insbesondere ein Schmiedegesenk das in Gravurendfortsätzen mindestens eine Dehnfuge zur Aufnahme von Materialüberschüssen, Zunder, Schmiermittel usw. aufweist. Das erfindungsgemäße Gesenk lässt die im Querfließpressverfahren günstig verformten Faserverläufe, insbesondere am Ende der Fortsätze, bestehen und presst die Faserverläufe bzw. den Faserfluss weiter. Ein Brechen, Stauchen oder Umlenkung des Faserverlaufs an einer Gravurwand wird im Wesentlichen aufgrund der Dehnfuge am entsprechenden Gravurbereich vermieden. Überschüssiges Material kann in die Dehnfuge oder Dehnrille im Gesenk ausweichen.For the forging method described above, in particular, a forging die is suitable which has at least one expansion joint in engraving end extensions for receiving excess material, scale, lubricant, etc. The die according to the invention allows the fiber courses, which are favorably deformed in the transverse extrusion method, to exist, in particular at the end of the extensions, and further presses the fiber progressions or the fiber flow. A breaking, upsetting or deflection of the fiber flow on a gravure wall is essentially avoided due to the expansion joint at the corresponding engraving area. Excess material can escape into the expansion joint or expansion groove in the die.
Es versteht sich, dass die vorstehend genannten und nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen verwendbar sind.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively indicated combination but also in other combinations.
Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels unter Bezugnahme die Zeichnung näher erläutert. Darin zeigt:
-
Fig. 1 eine schematische Querschnittsansicht beim seitlichen Querfließpressen, -
Fig. 2 einen radialen Querschnitt des gemäßFig. 1 hergestellten Rohlings, -
Fig. 3 eine Seitenansicht eines erfindungsgemäßen Schmiedeteils, -
Fig. 4 eine Querschnittsansicht des Schmiedeteils gemäßFig. 3 im radialen Querschnitt und -
Fig. 5 das erfindungsgemäße Schmiedeteil in perspektivischer Ansicht.
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Fig. 1 a schematic cross-sectional view of the lateral cross extrusion, -
Fig. 2 a radial cross section of according toFig. 1 produced blanks, -
Fig. 3 a side view of a forged part according to the invention, -
Fig. 4 a cross-sectional view of the forging according toFig. 3 in radial cross-section and -
Fig. 5 the forging of the invention in a perspective view.
Die
Die
Die
Die
An jedem Gravurbereich für Fortsatzenden ist eine Dehnfuge oder auch Dehnrille 16 in den Gravurendfortsätzen des Schmiedegesenks 15 ausgebildet. Die Dehnfugen 16 dienen dazu, beim Schmieden überschüssiges Material, Zunder, Schmiermittel etc. aufzunehmen, so dass Material in die Dehnfugen ausweichen kann und die Faserverläufe 2a, 2b nicht gebrochen werden. Zusammenhängende Faserverläufe sind für ein Schmiedeteil 11 mit hoher Festigkeit besonders vorteilhaft.At each engraving area for extension ends, an expansion joint or
Der einseitige Fortsatz 8 am Schmiedeteil 11 ist, wie in der
Der mittlere Zahn 12 weist einen im Wesentlichen parallel zur Flanke 20 laufenden Faserverlauf 2b auf. Bei den seitlichen Zähnen 13, 14 können die Faserflüsse zur Flanke 19 leicht schräg verlaufen, da diese an den Seitenrändern des Fortsatzes 8 angrenzen.The
Aufgrund der Dehnfugen 16 an Gesenkgravurendbereichen 18 entstehen an den Enden der Zähne 12, 13, 14 Grate, die spanend, insbesondere durch Abschleifen, entfernt werden. Somit wird durch eine geringe Nachbearbeitung eine fertige Segmentwelle gemäß
Alle Figuren zeigen lediglich schematische nicht maßstabsgerechte Darstellungen.All figures show only schematic not to scale representations.
Obwohl die Erfindung anhand verschiedener Ausführungsformen beschrieben wurde, ist sie keineswegs auf diese Ausführungsformen eingeschränkt. Eher sind diese Ausführungsformen nur exemplarische Ausführungsformen. Abwandlungen der obigen exemplarischen Ausführungsformen sind Fachleuten und anderen ohne Abweichung vom Schutzbereich der Erfindung offensichtlich. Der Schutzumfang der Erfindung wird ausschließlich durch die Ansprüche, wie sie durch die Beschreibung erläutert sind, definiert.Although the invention has been described in terms of various embodiments, it is by no means limited to these embodiments. Rather, these embodiments are merely exemplary embodiments. Modifications of the above exemplary embodiments will be apparent to those skilled in the art and others without departing from the scope of the invention. The scope of the invention is defined solely by the claims as explained by the description.
- 11
- Rundmaterialround material
- 2a2a
- Faserverlaufgrain
- 2b2 B
- Faserverlauf in FortsatzFiber course in extension
- 44
- Stirnseitefront
- 55
- Stempelstamp
- 66
- Stempelstamp
- 77
- erste Formfirst form
- 88th
- Fortsatzextension
- 99
- Materialansammlungmaterial collection
- 1010
- Rohlingblank
- 1111
- Schmiedeteilforging
- 1212
- Mittelzahnmiddle tooth
- 1313
- Zahntooth
- 1414
- Zahntooth
- 1515
- Schmiedegesenkforging
- 1616
- DehnrilleDehnrille
- 1919
- seitliche Zahnflankelateral tooth flank
- 2020
- ZahnflankenmitteTooth flank center
Claims (10)
- Method for the production of a forged part, especially sector shafts (11) having an extension (11, 12, 13) that is designed as a unilateral, asymmetric part with three teeth, whereas- in a first form (7) round material (1) is pressed to a blank (10) by transverse impact extrusion accumulating material at one side and, subsequently, forged in a forging die (15) until the final form of the forged part has nearly been reached, so that the fibers in the flanks of the middle tooth are aligned parallel to the flanks and, thus, increase the strength of the middle tooth.
- Method according to claim 1, characterized in that the round material (1) is heated prior to the transverse impact extrusion.
- Method according to claim 1 or 2, characterized in that the blank (10) is pressed into a forging die (15) with at least one die cavity extension with at least one expansion joint (16, 17, 18).
- Method according to one of the previous claims 1 to 3, characterized in that the feedstock is made of rolled round steel, in particular of coke-rolled round steel.
- Method according to one of the previous claims 1 to 4, characterized in that the forged part (11) is forged in standing position axially to the blank (10).
- Method according to claim 3, characterized in that the forged part (11) is, due to the expansion joint (16, 17, 18) in the forging die (15), shape-cut with an extension (8) that is designed as a unilateral, asymmetric part with three teeth at least at the end of the teeth.
- Method according to one of the previous claims 1 to 6, characterized in that the forged part (11) is a sector shaft with three teeth (12, 13, 14).
- Forged part, in particular sector shaft (11) essentially of longish design with an extension that is designed as a unilateral, asymmetric part with three teeth (11, 12, 13), produced according to a method according to one of the claims 1 to 7, whereby the fibers (2a, 2b) within the flanks of the middle tooth are aligned parallel to the flanks.
- Forged part (11) according to claim 8, characterized in that the ends of the three teeth of the unilateral, asymmetric extension (8) are shape-cut.
- Forging die (15) for the production of a sector shaft with an extension (11, 12, 13) that is designed as a unilateral, asymmetric part with three teeth and for the implementation of this method according to one of the claims 1 to 7, whereby the forging die (15) has at least one expansion joint (16) within the gravure expansions to accept excessive material or forged part scales etc.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006060020A DE102006060020A1 (en) | 2006-12-19 | 2006-12-19 | Method for producing a forged part, forging and forging die |
PCT/DE2007/001844 WO2008074279A1 (en) | 2006-12-19 | 2007-10-16 | Method for the production of a forged part, forged part, and forging die |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2106309A1 EP2106309A1 (en) | 2009-10-07 |
EP2106309B1 true EP2106309B1 (en) | 2010-05-12 |
Family
ID=39027072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07817679A Not-in-force EP2106309B1 (en) | 2006-12-19 | 2007-10-16 | Method for the production of a forged part, forged part, and forging die |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2106309B1 (en) |
AT (1) | ATE467472T1 (en) |
DE (2) | DE102006060020A1 (en) |
ES (1) | ES2356327T3 (en) |
WO (1) | WO2008074279A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101537437B (en) * | 2009-04-22 | 2011-01-05 | 浙江飞挺管业有限公司 | Special pressure relief device for manufacturing three-way pipe fittings by cold extrusion forming |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH232406A (en) * | 1942-01-31 | 1944-05-31 | Ig Farbenindustrie Ag | Die. |
AT235115B (en) * | 1961-12-09 | 1964-08-10 | Carl Dan Peddinghaus Kommandit | Method for producing drop forgings, in particular steering knuckles, and apparatus for producing preform blanks for the same |
US4571977A (en) | 1981-09-22 | 1986-02-25 | Hitachi, Ltd. | Method of forging flanged shaft |
JP2005040842A (en) * | 2003-07-24 | 2005-02-17 | Uk:Kk | Method of forming hollow stepped shaft |
DE10352664B4 (en) * | 2003-11-11 | 2007-01-18 | Cdp Bharat Forge Gmbh | Forging and forging and process for its preparation |
-
2006
- 2006-12-19 DE DE102006060020A patent/DE102006060020A1/en not_active Withdrawn
-
2007
- 2007-10-16 AT AT07817679T patent/ATE467472T1/en active
- 2007-10-16 EP EP07817679A patent/EP2106309B1/en not_active Not-in-force
- 2007-10-16 ES ES07817679T patent/ES2356327T3/en active Active
- 2007-10-16 DE DE502007003804T patent/DE502007003804D1/en active Active
- 2007-10-16 WO PCT/DE2007/001844 patent/WO2008074279A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2008074279A1 (en) | 2008-06-26 |
ES2356327T3 (en) | 2011-04-07 |
DE502007003804D1 (en) | 2010-06-24 |
DE102006060020A1 (en) | 2008-06-26 |
EP2106309A1 (en) | 2009-10-07 |
ATE467472T1 (en) | 2010-05-15 |
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