|Publication number||US2502737 A|
|Publication date||Apr 4, 1950|
|Filing date||Jun 19, 1945|
|Priority date||Nov 2, 1944|
|Publication number||US 2502737 A, US 2502737A, US-A-2502737, US2502737 A, US2502737A|
|Inventors||Andre Lemoine, Francois Meley|
|Original Assignee||Cie Forges Et Acieries Marine|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (11), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
April 4, 1950 F. MELEY ET AL. 2,502,737
METHOD FOR FORGINGCONNECTING RODS Filed June 19, 1 45 I 5 Sheets-Sheet 1 177 for/769- Aprifl 4, 1950 F. 'MELEY ET AL 2,592,737
METHOD FOR FORGING CONNECTING RODS Filed June 19, 1945 I Z5 Sheets-Sheet 3 14%. or e a" Patented Apr. 4, 1950 UNITED STATES PATENT OFFICE METHOD FOR FORGING CONNECTING RODS Application June 19, 1945, Serial No. 600,377 In France November 2, 1944 1 Claim.
Our invention has for its object a method for manufacturing forged connecting bars having an integral fibre formation.
In accordance with said method we start from a blank having itself a proper fibrous constitution as obtained in accordance with the teachings of the copending U. S. patent application Ser. No. 600,375, filed June 19, 1945, for Method of forging blanks.
Operating according to said teachings, we obtain starting from a section of ingot or bar, two blanks wherein the less sound parts corresponding to the axial zone of the ingot 01' bar have been eliminated.
The method according to the present invention consists in plastically deforming the metal of these blanks in a manner such as will provide a direction and an arrangement of the fibres ensuring a maximum resistance against stresses of opposite and alternating directions. In particular this deformation provides for the fibres remaining perpendicular to the transversal effort in the parts which resist to shearing stresses.
Appended drawing shows by way of example and by no means in a limitative manner the application of our method to the manufacture of a master connecting rod for a seven-cylinder star motor.
Figs. 1 to 12 recall to mind the difierent known steps in the production of a first blank having enclosing fibres without the impure portions of the original ingot section.
Figs. 1, 2, 4, 5, 7, 9 and 11 are side views and Figs. 3, 6, 8, and 12 plan views, corresponding respectively to Figs. 2, 5, 7, 9 and 11.
Fig. 13 shows the blank in plan view after stamping.
Fig. 14 is a cross-section along line XIV-XIV of Fig. 13 of the same blank.
Figs. 15 and 16 show the manner of performing a first and then a second punching.
Fig. 17 is a plan View of the blank after said punching.
Figs. 18 and 19 illustrate the manner of operating for a third and a fourth punching operation.
Fig. 20 is a view of the blank when finished.
Fig. 21 is a cross-section along line XXIXXI of Fig. 2 showing the same blank.
The original ingot section (Fig. 1), more or less forged or rolled, comprises impure parts in its axial portions as bonded by the interrupted lines bcbc'. Its outer portions a. are on the contrary formed of sound metal. Starting from said ingot section, a first blank is prepared in accordance with the method disclosed in our said copending application. To this end it is given, through swaging, the shape of a shuttle as shown in Figs. 2 and 3. It is then flattened along its axis so as to be transformed into a thick disc (Fig. 4). A further flattening in a direction perpendicular to the preceding gives the ingot section the elongated shape shown in Figs. 5 and 6. It is swaged in a manner such that its ends become wider than the intermediate zone (Figs. '7 and 8). The central part mn-mn, in which the impurities are collected is finally eliminated and one obtains two first identical blanks provided with enclosing fibres. The principle of this manner of operating has been described in our copending above mentioned application.
A first preparation provides then the first desired blank containing no impurities and having already a suitable fibre arrangement.
The stamped object assumes its final shape (Figs. 13 and 14). It is then punched to form the apertures in the head and foot of the corn necting rod in two stages (Figs. 15, 16 and 17), then the axial holes for the foot of the small connecting rod, also in two stages (Figs. 18 and 19) and the blank reaches thus its final state (Figs. 20 and 21) It is apparent that the fibres are disposed in parallel sheets with a single out-- let at d. These fibres are perpendicular to the maximum transversal stresses transmitted by the small connecting rods in the peripheric parts 6 of the head of the connecting rod in front of the holes serving for the pivotal mounting of the small connecting rods.
What we claim is:
A process for obtaining from an ingot preliminarily subjected to a mechanical treatment to secure a longitudinal fibre structure two connecting rod blanks of sound metal wherein the fibres are parallel to the contour of said blanks comprising attenuating the ends of said ingot by swaging to give it the form of a shuttle, flattening said shuttle along its axis to form a thick disc, flattening said disc along a diameter thereof to form a bar with rounded ends, partially flattening the median portion of said bar and then removing the central unsound part of said flattened median portion of said bar to form said blanks.
FRANCOIS MELEY. ANDRE LEMOINE.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 942,489 Dods Dec. 7, 1909 1,581,512 Coates Apr. 20, 1926 1,586,632 McConway June 1, 1926 1,707,778 Witherow Apr. 2, 1929 1,791,187 Brauchler Feb. 3, 1931 2,080,640 Templin May 18, 1937 2,169,894 Griley Aug. 15, 1939
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US942489 *||May 6, 1909||Dec 7, 1909||John H Dods||Method of making wrought articles.|
|US1581512 *||Aug 25, 1920||Apr 20, 1926||By Mesne Assignments||Method oe making abticles from steel ingots|
|US1586632 *||Nov 18, 1922||Jun 1, 1926||A corpobation op|
|US1707778 *||Jan 5, 1926||Apr 2, 1929||Colonial Trust Co||Method of making metal articles|
|US1791187 *||Apr 5, 1929||Feb 3, 1931||Brauchler Charles A||Method of forging|
|US2080640 *||Jun 22, 1934||May 18, 1937||Aluminum Co Of America||Method of preparing metal stock|
|US2169894 *||Apr 29, 1937||Aug 15, 1939||William W Criley||Method of forming blanks|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3010186 *||Jan 14, 1954||Nov 28, 1961||Thompson Ramo Wooldridge Inc||Piston manufacture|
|US3014272 *||Nov 23, 1955||Dec 26, 1961||Lyon Inc||Method of preparing metal blanks|
|US3222143 *||Feb 17, 1964||Dec 7, 1965||Mario Macchini||Universal joint yokes|
|US5544413 *||Jun 10, 1994||Aug 13, 1996||Omni Forge, Inc.||Method and apparatus for manfacturing a flashless metal connecting rod|
|US5655296 *||Dec 30, 1993||Aug 12, 1997||Ab Volvo||Method of manufacturing connecting rods|
|US5918575 *||Nov 7, 1996||Jul 6, 1999||Toyota Jidosha Kabushiki Kaisha||Processing method for a connecting rod|
|US6349688||Feb 18, 2000||Feb 26, 2002||Briggs & Stratton Corporation||Direct lever overhead valve system|
|US8205332 *||Dec 8, 2008||Jun 26, 2012||Mahle International Gmbh||Method of forming a connecting rod from two dissimiliar materials by providing material blanks of dissimiliar material, joining the material blanks and subsequently forming the connecting rod|
|US20100139091 *||Dec 8, 2008||Jun 10, 2010||Lapp Michael T||Connecting rod|
|DE4328375A1 *||Aug 24, 1993||Mar 9, 1995||Mahle J Wizemann Gmbh & Co Kg||Roller lever|
|DE4328375C2 *||Aug 24, 1993||Feb 15, 2001||Peter Peppler||Rollenhebel|
|U.S. Classification||29/888.92, 428/611|
|International Classification||B21K1/00, B21K1/76|