EP2148752A1 - Method for producing hollow shaft base bodies and hollow shaft base body produced according to said method - Google Patents
Method for producing hollow shaft base bodies and hollow shaft base body produced according to said methodInfo
- Publication number
- EP2148752A1 EP2148752A1 EP08758076A EP08758076A EP2148752A1 EP 2148752 A1 EP2148752 A1 EP 2148752A1 EP 08758076 A EP08758076 A EP 08758076A EP 08758076 A EP08758076 A EP 08758076A EP 2148752 A1 EP2148752 A1 EP 2148752A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow shaft
- preform
- particular according
- forming
- bore
- 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.)
- Granted
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
- B21K1/06—Making machine elements axles or shafts
- B21K1/10—Making machine elements axles or shafts of cylindrical form
-
- 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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- 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
- B21K1/063—Making machine elements axles or shafts hollow
Definitions
- EP 1 745 870 A1 has disclosed a method for producing hollow shaft main bodies, this method being characterized in that, in a first step, the outer surface of a cylindrical starting material is machined by forming to at least a predetermined diameter transition in the longitudinal direction of a base body to obtain. During this first step, namely by means of a cross wedge rolling process, a hole should also be formed by means of one or two mandrels. Thereafter, in a further method step, namely by incremental forming, the outer and / or inner surface of the base body is produced.
- the method for producing hollow-shaft basic bodies according to the invention provided with at least one bore is now characterized in that, in a first step, in which both the outer surface of a cylindrical starting material and the bore are formed by forming a preform or a blank is processed, at least a predetermined diameter transition in the longitudinal direction of the preform is generated, and
- the preform is incrementally formed by reshaping the outer and / or inner surface of the main body to form the hollow shaft
- Body is reshaped.
- the blanks By producing a preform or a blank by forming, which is particularly suitable for the vast majority of applications, a forging process, the blanks can be made in simple tools and also provided with a hole and then serve as a raw material for the next step.
- the bore can either only partially be introduced into the body or be continuous. Even with continuous drilling only a small amount of waste is present through the appropriately for forging process belonging punching the Butzens.
- Forging tools By the use of forging tools a particularly favorable mass production is possible.
- the previously mentioned punching the Butzens can also be done in a separate operation in a tool outside of a forging tool.
- the forming into a preform can also be done in a forming process, the half-warm or - z. B. depending on the required degree of deformation or application - is carried out cold.
- the preform thus produced is further reshaped, namely the inner and / or outer surface is reshaped, is suitable in particularly favorable manner the so-called rotary swaging, which may be application or product-related cold or Halbwarmrundkneten.
- rotary swaging which may be application or product-related cold or Halbwarmrundkneten.
- the invention further relates to hollow shafts, z.
- transmission shafts which are produced by the inventive combination of at least one of the cited in the claims and protectable process steps, wherein the shaft has a continuous or only partially introduced bore.
- the preform 1a has a shank portion 2a and a flange portion 3a and a through bore 4a.
- the shaft region as well as the bore may be cylindrical or conical.
- the preform 1a is made by a forging process, which is performed in a multi-stage mold.
- One of the consequences of the bore 4a is introduced to a slug 5.
- This slug is either punched out in a next station or can be punched out in a tool outside the forging tool.
- the preform 1a is converted into the hollow shaft main body 1b, in particular incrementally, in particular by swaging, while the flange region 3a can be largely retained and the incremental deformation carried out in the region adjoining the region 3b.
- a cylindrical or profiled mandrel can be inserted in sections from the side facing away from the flange region 3a by corresponding preforming of the region 2b and 2b ' .
- FIG. 2 shows a further embodiment according to the invention, wherein the upper region 11 a of FIG. 2 represents the preform and the lower region in turn represents the hollow shaft main body 11 b.
- the introduced in the forging process bore 12a extends only partially through the blank 11a, the area generated by incremental forming is denoted by 13.
- the forging preform 21a is provided with an undercut 22 which, like the blank 21a, is made by forging.
- the hollow shaft main body 21b shown in the lower part of Figure 3 is formed in the region 23 by swaging.
- the region 23 may be supported by a mandrel during the forming process depending on the desired inner shape.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007024743 | 2007-05-26 | ||
PCT/DE2008/000833 WO2008145092A1 (en) | 2007-05-26 | 2008-05-15 | Method for producing hollow shaft base bodies and hollow shaft base body produced according to said method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2148752A1 true EP2148752A1 (en) | 2010-02-03 |
EP2148752B1 EP2148752B1 (en) | 2012-04-18 |
Family
ID=39773115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08758076A Not-in-force EP2148752B1 (en) | 2007-05-26 | 2008-05-15 | Method for producing hollow shaft base bodies |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2148752B1 (en) |
AT (1) | ATE553867T1 (en) |
DE (2) | DE112008002036A5 (en) |
WO (1) | WO2008145092A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102319854A (en) * | 2011-08-18 | 2012-01-18 | 贵州航天新力铸锻有限责任公司 | Forging method for side end enclosures of supercritical steam-water separators |
DE102012106585A1 (en) * | 2012-07-20 | 2014-01-23 | Benteler Automobiltechnik Gmbh | Method for producing a high-pressure fuel line |
DE102015221842A1 (en) * | 2015-11-06 | 2017-05-11 | Volkswagen Aktiengesellschaft | Method for producing a gear shaft |
DE102017212989A1 (en) * | 2017-07-27 | 2019-01-31 | Volkswagen Aktiengesellschaft | Production of a hollow shaft by radial forming of a short blank |
DE102019111048A1 (en) * | 2019-04-29 | 2020-10-29 | Volkswagen Aktiengesellschaft | Method for manufacturing a hollow shaft |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19705279A1 (en) * | 1997-02-12 | 1997-11-20 | Daimler Benz Ag | Gear shaft forming to give reduced cavity diameters at shaft ends |
JP2005040842A (en) * | 2003-07-24 | 2005-02-17 | Uk:Kk | Method of forming hollow stepped shaft |
DE102006019234A1 (en) * | 2005-06-14 | 2006-12-28 | IFUTEC Ingenieurbüro für Umformtechnik GmbH | Process to modify the end of a solid metal work piece e.g. gear drive shaft by heating and application of plunger die |
EP1745870A1 (en) | 2005-07-22 | 2007-01-24 | Johann Hay GmbH & Co. KG, Automobiltechnik | Method of manufacturing base bodies of hollow axles |
-
2008
- 2008-05-15 AT AT08758076T patent/ATE553867T1/en active
- 2008-05-15 EP EP08758076A patent/EP2148752B1/en not_active Not-in-force
- 2008-05-15 DE DE112008002036T patent/DE112008002036A5/en not_active Ceased
- 2008-05-15 DE DE102008023696A patent/DE102008023696A1/en not_active Withdrawn
- 2008-05-15 WO PCT/DE2008/000833 patent/WO2008145092A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008145092A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE112008002036A5 (en) | 2010-04-29 |
EP2148752B1 (en) | 2012-04-18 |
DE102008023696A1 (en) | 2008-12-24 |
WO2008145092A1 (en) | 2008-12-04 |
ATE553867T1 (en) | 2012-05-15 |
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