EP0775027B1 - Verfahren zur herstellung einer hohlen achse - Google Patents
Verfahren zur herstellung einer hohlen achse Download PDFInfo
- Publication number
- EP0775027B1 EP0775027B1 EP95925736A EP95925736A EP0775027B1 EP 0775027 B1 EP0775027 B1 EP 0775027B1 EP 95925736 A EP95925736 A EP 95925736A EP 95925736 A EP95925736 A EP 95925736A EP 0775027 B1 EP0775027 B1 EP 0775027B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner tube
- outer tube
- tube
- cold
- 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.)
- Expired - Lifetime
Links
Images
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
- B21K1/063—Making machine elements axles or shafts hollow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/151—Making tubes with multiple passages
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
Definitions
- the invention relates to a method for producing a hollow axis, the in particular for the storage of valve actuation levers for controlling Gas exchange valves used in an internal combustion engine, according to the generic term of the main claim.
- a hollow axis, in particular a rocker arm axis of the type mentioned is from the DE 42 21 708 A1 known.
- the rocker arm axis consists of an outer tube, in the interior of which a profiled tubular body is arranged in a fixed manner.
- a tubular body having a longitudinal web is at least two, preferably three liquid-carrying chambers are formed.
- a special embodiment is to form a chamber of the tubular body with an approximately V-shaped trained, extending in the longitudinal direction cutout.
- the inserted or pressed-in tubular body is fixed by cam-like elevations or profiles of the shell of the tubular body. Disadvantageous is that maintaining the position fix as well as sealing the chambers is not ensured under operational conditions and the producible lengths are limited, so that the manufacturing costs are correspondingly high.
- GB-A-2117281 describes a process for the production of heat exchanger tubes disclosed. Instead of several distributed over the circumference in a complex manner Longitudinal holes in short lengths are made on a thick-walled Inner tube grooves attached. This inner tube prepared in this way is turned into a second tube (Outer tube) and both tubes become tight with a cold draft pulled together. An internal tool is preferably used in the cold drawing Inner tube arranged. To seal between two adjacent grooves ensure a solder is formed on the outer surface of the inner tube a paste, a powder or a film applied and this in one final annealing process melted.
- the object of the invention is to provide a method for producing a hollow axis, to provide in particular for the pivotable mounting of valve actuation levers, where the position fixation and the sealing of the chambers also under operational Conditions are maintained and that the inexpensive manufacture of longer lengths allowed.
- the hollow axis generated is characterized in that to form two Instead of a slide-in profile, chambers are integral with the outer tube connected profiled inner tube is used.
- the profiled inner tube shows seen in cross-section inward arched area that is rounded and goes into the circular area without a paragraph. Sealing the two Chambers are made in such a way that the whole comes to the plant Circumferential area of the inner surface of the outer tube and the outer surface of the Inner tube is provided with a solder layer.
- the outer as well as the inner tube are preferably both made of steel. But also other materials such as Cu, Al and Combinations with steel are possible. When used as a rocker arm axle, it is in In many cases it is necessary to partially inductively harden the hollow axis. In one The case is preferably an outer tube made of tempered steel used.
- the advantage of the method according to the invention is that the profiled Inner tube can be pulled or rolled inexpensively. According to the state of the The slide-in profile used in technology is only possible using a complex extrusion process producible. Due to the entire scope of the system applied solder layer ensures the required tightness of the chambers. By cold-pulling the previously inserted tubes, they become sound-proof pulled together. It should be noted that the two are pressed together Surfaces are as bright as possible metallic and there are no disturbing foreign particles in between. This is achieved by pushing before one another both the outer and inner tubes are bare in a reducing atmosphere be annealed. In addition, you can use this heat treatment Pre-degrease to ensure that none may be there are more cracking lubricant residues on the surface.
- the chamber is maintained tight proposed the inner surface of the outer tube and the outer surface of the To provide inner tube with an intermediate solder layer.
- the outer surface of the inner tube is galvanized before being pushed into one another copper plated.
- the latter type of application can still be supported through an electrostatic charge.
- the actual soldering is then done by a Annealing after cold drawing. This annealing can be a heat treatment that after the cold drawing would be necessary or an annealing in the course of the Induction hardening.
- the gap in the transition between curved area of the inner tube and conforming area of the outer tube to be filled with a solder.
- the smaller one formed by the inner tube Chamber inserted a solder wire made of copper, for example, and the tube was then annealed.
- the high temperature required for annealing in the range of 1100 ° C Using a hard solder made of Cu can lead to coarse grain formation depending on the steel grade to lead. In order to largely eliminate these, it is also proposed that after the Solder to perform normalization annealing.
- the hollow axis should be one Have an outside diameter of 24 mm and a wall thickness of 5.0 mm.
- the hollow axis thus formed has an outer diameter of 24 mm with a total wall thickness of 5 mm. So that the two sound each other drawn tubes are also cohesively connected, the hollow axis is used for soldering subjected to annealing at 1100 ° C.
- Fig. 1 shows in cross section based on the previously described manufacturing example in the finished state a hollow axis with an outer tube 1, z. B. from a tempering steel Ck45 and a profiled inner tube 2, z. B. from St35. Both tubular bodies were pulled together coldly as described above.
- the profiled inner tube 2 forms two chambers 3, 4 together with the outer tube 1, the smaller chamber 4 being limited in cross section by an inner peripheral region of the outer tube 1 and an outer peripheral region of the inwardly extending curvature 5 of the inner tube 2 merges rounded into the circular area 6 of the inner tube 3. Ideally, this circular area 6 comes fully to bear on the inside of the outer tube 1.
- the degree of the system is strongly influenced by the type of bulge 5.
- the proposed integral connection between inner tube 2 and outer tube 1 has the advantage that when calculating the load capacity of the hollow axis Total wall, d. H. Wall outer tube 1 plus wall inner tube 2 must be taken into account can. This enables a reduction in the wall thickness of the outer tube 1 and leads to a corresponding weight saving. Otherwise in the state of the Technically provided web to increase the rigidity can thus be omitted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
Claims (2)
- Verfahren zur Herstellung einer hohlen Achse zur schwenkbaren Lagerung von Ventilbetätigungshebeln zur Steuerung von Gaswechselventilen einer Brennkraftmaschine, bestehend aus einem Außenrohr (1), in dessen Innenraum zur Bildung zweier flüssigkeitsführender Kammern (3,4) ein darin fixierter Rohrkörper angeordnet ist, wobei der als profiliertes Innenrohr (2) ausgebildete Rohrkörper vor dem Einschieben in das Außenrohr (1) mit einem im Querschnitt gesehen nach innen gewölbten Bereich (4) versehen wird, der abgerundet ohne Absatz in den kreisförmigen Bereich übergeht,
dadurch gekennzeichnet,daß das Außenrohr (1) und das durch Kaltziehen oder Kaltwalzen erzeugte profilierte Innenrohr (2) nach Anformung einer Angel durch Kaltziehen klangfest aufeinandergezogen werden und vor dem Einschieben das Außenrohr (1) als auch das Innenrohr (2) einer Wärmebehandlung mit einer reduzierenden Atmosphäre unterzogen werden und nach dem Kaltziehen und vor dem abschließenden Glühen in die durch das profilierte Innenrohr (2) entstandene kleinere Kammer (4) ein Lötdraht eingelegt und die gesamte hohle Achse einer Normalisierungsglühung unterworfen wird, wobei durch die abschließende Glühung der Lötdraht zum Schmelzen gebracht wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,daß beim Kaltziehen das Profil des Innenrohres durch ein Innenwerkzeug abgestützt wird.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4428875A DE4428875C2 (de) | 1994-08-08 | 1994-08-08 | Verfahren zur Herstellung einer hohlen Achse |
| DE4428875 | 1994-08-08 | ||
| PCT/DE1995/000986 WO1996005004A1 (de) | 1994-08-08 | 1995-07-19 | Verfahren zur herstellung einer hohlen achse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0775027A1 EP0775027A1 (de) | 1997-05-28 |
| EP0775027B1 true EP0775027B1 (de) | 1999-04-14 |
Family
ID=6525716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95925736A Expired - Lifetime EP0775027B1 (de) | 1994-08-08 | 1995-07-19 | Verfahren zur herstellung einer hohlen achse |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5881946A (de) |
| EP (1) | EP0775027B1 (de) |
| JP (1) | JP3694026B2 (de) |
| DE (2) | DE4428875C2 (de) |
| WO (1) | WO1996005004A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19702087A1 (de) * | 1997-01-22 | 1998-07-23 | Grohe Kg Hans | Verfahren zum Herstellen eines Hohlkörpers und Hohlkörper |
| DE19934405B4 (de) * | 1999-07-22 | 2005-10-20 | Daimler Chrysler Ag | Hohlwelle mit Innenkanälen, insbesondere Ölkanälen |
| DE102015122296A1 (de) * | 2015-12-18 | 2017-06-22 | Sandvik Materials Technology Deutschland Gmbh | Sensor für eine Hochdruckleitung sowie Verfahren zu seiner Herstellung |
| AU2016369860A1 (en) * | 2015-12-18 | 2018-06-28 | Sandvik Materials Technology Deutschland Gmbh | A method for manufacturing a tube of metal as well as a tube of metal |
| BR112019009809B1 (pt) * | 2016-11-16 | 2022-09-13 | Sandvik Intellectual Property Ab | Método para fabricar um sistema e método para fabricar um umbilical |
| WO2021121667A1 (en) * | 2019-12-19 | 2021-06-24 | Eaton Intelligent Power Limited | Sleeved rocker shaft for type iii heavy duty valve train |
| GB2618552A (en) * | 2022-05-10 | 2023-11-15 | Cummins Inc | Composite rocker shaft with integrated oil galleries |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2007597A (en) * | 1933-11-16 | 1935-07-09 | George H Dean | Built-up column and method of making the same |
| US3101531A (en) * | 1961-01-09 | 1963-08-27 | Western Gear Corp | Method of applying internal metallic linings to tubes and the like |
| US3394445A (en) * | 1965-03-11 | 1968-07-30 | Olin Mathieson | Method of making a composite porous metal structure |
| GB1233574A (de) * | 1968-08-23 | 1971-05-26 | ||
| DE2645953C3 (de) * | 1976-10-12 | 1981-04-30 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum Herstellen einer Lötverbindung |
| DE2919615A1 (de) * | 1979-05-16 | 1980-12-04 | Walter Hunger | Verfahren zur herstellung eines mehrfachrohres oder einer rundstange mit rohrummantelung |
| DE8022927U1 (de) * | 1980-08-28 | 1982-02-11 | Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach | Formstueck fuer rohrleitungen |
| DE3047736A1 (de) * | 1980-12-18 | 1982-07-15 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | Waermeaustauscher mit einem gewendelten doppelrohr |
| DE3211441A1 (de) * | 1982-03-27 | 1983-09-29 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Verfahren zur herstellung eines rohres mit in der rohrwandung befindlichen kanaelen |
| DE3738813A1 (de) * | 1987-11-16 | 1989-05-24 | Cordell Steve | Verfahren zur herstellung von mit einer armierung versehenen rohren |
| US4934579A (en) * | 1987-12-04 | 1990-06-19 | Compressor Components Textron Inc. | Attachment of dissimilar metals |
| DE4105701A1 (de) * | 1990-03-08 | 1991-09-12 | Mannesmann Ag | Verfahren zur herstellung eines metallischen, dickwandigen hochdruckrohres |
| DE4110318C2 (de) * | 1991-03-28 | 2001-10-11 | Bosch Gmbh Robert | Verfahren zum Zusammenlöten zweier Bauteile |
| DE4118929A1 (de) * | 1991-06-08 | 1991-10-24 | Zahnradfabrik Friedrichshafen | Welle mit axialen kanaelen |
| DE4221708C2 (de) * | 1992-07-02 | 1996-04-11 | Daimler Benz Ag | Achse zur Lagerung von Ventilbetätigungshebeln |
-
1994
- 1994-08-08 DE DE4428875A patent/DE4428875C2/de not_active Expired - Lifetime
-
1995
- 1995-07-19 JP JP50690896A patent/JP3694026B2/ja not_active Expired - Lifetime
- 1995-07-19 DE DE59505664T patent/DE59505664D1/de not_active Expired - Lifetime
- 1995-07-19 EP EP95925736A patent/EP0775027B1/de not_active Expired - Lifetime
- 1995-07-19 US US08/793,162 patent/US5881946A/en not_active Expired - Lifetime
- 1995-07-19 WO PCT/DE1995/000986 patent/WO1996005004A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10503714A (ja) | 1998-04-07 |
| DE4428875A1 (de) | 1996-02-15 |
| DE4428875C2 (de) | 1996-10-24 |
| EP0775027A1 (de) | 1997-05-28 |
| US5881946A (en) | 1999-03-16 |
| WO1996005004A1 (de) | 1996-02-22 |
| DE59505664D1 (de) | 1999-05-20 |
| JP3694026B2 (ja) | 2005-09-14 |
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