Method of restoring a wheel to compliance and tooling for performing the method
A method of restoring a wheel ( 1 ) to compliance, the wheel having a plurality of ovalized bores ( 2 ). The method is characterized in that it includes at least a step of boring a first ovalized bore ( 2 ) with the help of a reamer ( 3 ) presenting a longitudinal pilot portion ( 3 a ) and a longitudinal cutter portion ( 3 b ), the cutter portion ( 3 b ) presenting teeth ( 4 ) defining a cutting diameter (D 2 ), and the pilot portion ( 3 a ) presenting a pilot diameter (D 1 ) strictly less than the cutting diameter (D 2 ), the step of boring this first ovalized bore ( 2 ) consisting in inserting the reamer ( 3 ) into the first ovalized bore ( 2 ), beginning with the pilot portion ( 3 a ) and followed by the cutter portion ( 3 b ), the pilot diameter (D 1 ) being such that it enables the reamer ( 3 ) to be guided in translation inside the first ovalized bore ( 2 ) for boring.
1. A method of restoring a wheel ( 1 ) to compliance, the wheel having a plurality of ovalized bores ( 2 ), the method comprising:
boring a first ovalized bore ( 2 ) with a reamer ( 3 ) presenting a longitudinal pilot portion ( 3 a ) and a longitudinal cutter portion ( 3 b ), the cutter portion ( 3 b ) presenting teeth ( 4 ) defining a cutting diameter (D 2 ), and the pilot portion ( 3 a ) presenting a pilot diameter (D 1 ) strictly less than the cutting diameter (D 2 ), the step of boring said first ovalized bore ( 2 ) consisting of inserting the reamer ( 3 ) into the first ovalized bore ( 2 ), beginning with the pilot portion ( 3 a ) and followed by the cutter portion ( 3 b ), the pilot diameter (D 1 ) being such that it enables the reamer ( 3 ) to be guided in translation inside the first ovalized bore ( 2 ) for boring,
the method further comprising, prior to the step of boring the first ovalized bore ( 2 ), extracting a ring ( 6 ) engaged in the first ovalized bore ( 2 ), said extraction step being performed with an extractor tool ( 7 ) comprising a pin ( 8 ) presenting a longitudinal guide portion ( 8 a ) adapted to slide in the ring ( 6 ), said pin ( 8 ) presenting a bearing portion ( 8 b ) shaped to be able to come to bear against an axial end ( 6 a ) of the ring ( 6 ) while the guide portion ( 8 a ) is positioned inside the ring ( 6 ) and, in reaction to a compression force (F 1 ) of said bearing portion ( 8 b ) against said axial end ( 6 a ) of the ring, to cause the bearing portion ( 8 b ) to exert radial compression forces (F 2 ) on the ring directed towards a main axis of symmetry (Y-Y) of the ring ( 6 ),
wherein the longitudinal guide portion ( 8 a ) is a right cylinder, the bearing portion ( 8 b ) presents a frustoconical surface (S 1 ) on the same axis as the longitudinal guide portion ( 8 a ), the frustoconical surface (S 1 ) extends around the longitudinal guide portion ( 8 a ), the frustoconical surface (S 1 ) being arranged so as to define an annular hollow zone (Z 1 ) between the frustoconical surface (S 1 ) and the longitudinal guide portion ( 8 a ) that is surrounded by said frustoconical surface (S 1 ), and
wherein said extracting step is performed by moving the pin ( 8 ) so as to force the bearing portion ( 8 b ) of the pin ( 8 ) against the ring ( 6 ) and so as to generate said compression force (F 1 ) of said bearing portion ( 8 b ) against said axial end ( 6 a ) of the ring.
2. The method of restoring compliance according to claim 1 , wherein the reamer ( 3 ) extends along a longitudinal axis of symmetry (X-X) of the reamer, and during the boring step, the reamer ( 3 ) is assembled to a rotary drive machine ( 5 ) arranged to drive the reamer ( 3 ) in rotation about said longitudinal axis (X-X) of symmetry of the reamer, the rotary drive machine ( 5 ) being manually portable.
3. The method according to claim 2 , wherein the ring ( 6 ) is in the form of a right cylinder and presents an outside diameter (D 3 ) less than the cutting diameter (D 2 ) defined by the teeth ( 4 ) of the reamer, the boring step being performed in such a manner as to bore the first ovalized bore ( 2 ) so as to give it a right cylindrical inside shape of diameter equal to the cutting diameter (D 2 ), and then after performing the step of boring the first ovalized bore ( 2 ), the method of restoring compliance includes a step of engaging a corresponding replacement ring in each bore ( 2 ) that has been bored during the boring step.
4. The method according to claim 1 , wherein the ring ( 6 ) is in the form of a right cylinder and presents an outside diameter (D 3 ) less than the cutting diameter (D 2 ) defined by the teeth ( 4 ) of the reamer, the boring step being performed in such a manner as to bore the first ovalized bore ( 2 ) so as to give it a right cylindrical inside shape of diameter equal to the cutting diameter (D 2 ), and then after performing the step of boring the first ovalized bore ( 2 ), the method of restoring compliance includes a step of engaging a corresponding replacement ring in each bore ( 2 ) that has been bored during the boring step.