Marposs Societa' Per Azioni

Marposs, S.p.a.

William Montanari

Carlo Dall'Aglio

Franco Danielli

Matteo Aldrovandi

Carlo Dall'aglio

Bruno Zanetti

An apparatus for checking the diameter of crankpins of a crankshaft in the course of the machining in a grinding machine includes a Vee-shaped reference device, a measuring device associated with the reference device and including a feeler axially movable along the bisecting line of the Vee-shaped reference device, and a support device with a first arm rotating with respect to a support arranged on the grinding-wheel slide and a second arm rotating with respect to the first and carrying the Vee-shaped reference device. A guiding mechanism includes a limiting device, with mutually abutting surfaces and coupled to the support device, that guides the displacement of the reference device along a trajectory substantially parallel to the profile of the grinding wheel, allows the engagement of the reference device on a crankpin to be checked while the latter is orbitally moving, and does not interfere with the displacements of the support device caused by the orbital motion of the crankpin in the checking condition.

Apparatus for the dimensional checking of an orbitally rotating crankpin of a crankshaft

Apparatus for the dimensional checking of orbitally rotating pins

A method and a relevant apparatus for controlling the machining of a piece () rotating in a numerical control machine tool () includes the steps of detecting instantaneous values (V(i)) indicative of the dimensions of the piece during the machining, performing dynamic processing of the detected instantaneous values and controlling at least one machining phase on the basis of the processing. The method includes dynamic calculation of average values (M(j)) of sequences of the detected values, acquisition of a variation index (P) indicative of the average values trend during the machining and of a correction coefficient (K) that allows for the delay of the calculated average values with respect to the actual dimensions of the piece, and processing of an instantaneous dimension (RI) of the piece that is transmitted to the numerical control of the machine tool for controlling the machining.

Method and apparatus for controlling the machining of mechanical pieces

Method for the in-process dimensional checking of orbitally rotating crankpins

A method and an apparatus for balancing an elongate structure () rotating about an axis, like a spindle () carrying two grinding wheels (), wherein two vibration-detecting sensors () and associated balancing devices () with movable masses () are arranged at two checking sections (S, S) spaced out along the axis of rotation. Processing and control means () control the balancing devices on the basis of one or more signals (V; V, V) achieved as combination(s) of the vibrations, in module, detected by both the sensors.

Method and apparatus for the dynamic balancing of a rotating structure

Apparatus for the in-process dimensional checking of orbitally rotating crankpins

Apparatus for the in-process dimensional checking of cylindrical parts

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Castel Maggiore, Italy

William Montanari