Method of assembling internal combustion engine connecting rod

Method for producing a connecting rod having a big end and a small end from as-forged rough half connecting rods having rough joint surfaces, in which the rough half connecting rods are placed along the periphery of a circular plate for the distribution of the different successive machining operations, said method comprising:

• placing and clamping the as-forged rough half connecting rods in pairs in a diametrally opposed manner, the joint surfaces remaining free,
• carrying out on each of the two half connecting rods a boring, spotfacing and machine surfacing operation on the joint surface, said boring and spotfacing being intended for the mechanical assembly of said half connecting rods and a fixture of the half connecting rods on the plate,
• producing on the machined joint surface of the two half connecting rods serrations which ensure by their shape, after the assembly of the two facing half connecting rods a locking against slip in a joint plane joining said half connecting rods, in particular along a longitudinal axis of said connecting rod and along an axis of the crankpin and/or piston pin simultaneously,
• surfacing parallel faces defining the thickness of the connecting rod big end or small end,
• assembling the two half connecting rods by a rotation through 180° of a half connecting rod relative to an axis of rotation parallel to the plane of the circular plate, the serrations fitting into one another in a complementary manner, and
• machining bores forming bearings of the connecting rod big end or small end.