Finike Italiana Marposs, S.p.a.

Marposs Societa' Per Azioni

Narciso Selleri

Guido Golinelli

Mario Possati

Carlo Dall'Aglio

Giuliano Longhi

Antonio Bolognesi

Giancarlo Gherdovich

Apparatus for checking surface features of conical parts including a

Apparatus for non-contact dynamic inspections of a plurality of pieces

Gauge for checking linear dimensions of mechanical pieces comprising a support, two arms movable with respect to the support, two feelers respectively fixed to the arms for contacting the piece to be checked and a position transducer having two mutually movable elements respectively fixed to the movable arms. At least one of the two elements of the transducer is fixed to the relevant movable arm by screw, nut-screw coupling and between the screw and the nut-screw there is arranged a thread insert, having at least one polygonal coil, which permits adjustment of the mutual position of the elements of the transducer, while assuring a stable adjustment.

Gauge for checking linear dimensions of mechanical pieces

Probe for use in apparatus for checking linear dimensions of mechanical pieces including a support, an arm-set carried by the support and having a movable arm carying a feeler for contacting the piece to be checked, and a protective diaphragm coupled to the support and the movable arm; the protective diaphragm includes a cloth core and a rubber coating.

Probe for use in apparatus for checking linear dimensions of mechanical

Gauge for checking linear dimensions of mechanical pieces comprising a support, two arms movable with respect to the support, two feelers respectively fixed to the arms for contacting the piece to be checked and a position transducer having two mutually movable elements respectively fixed to the movable arms. Each feeler is fixed to the relevant movable arm by screw, nut-screw coupling and between the screw and the nut-screw there is arranged a thread insert, having at least one polygonal coil, which permits adjustment of the position of the feeler, while assuring a stable adjustment.

Two machine tools are provided with control systems for machining two different types of pieces to be matched to each other. In order to obtain small batches of relevant pieces that basically can be completely matched to one another, the control systems are independent from each other and each of them comprises post-process and in-process checking stations; the first station, besides checking the proper operation of the in-process station progressively and at short regular intervals changes its zero condition, so as to obtain machining pieces having dimensions evenly distributed within the relevant tolerance range.

Method and relevant apparatus for controlling machine tools

A gauging head, for checking linear dimensions of workpieces, comprises a casing; two movable arms, pivotable about pins fixed to the casing, and carrying feelers for contacting the workpiece to be checked; two position transducers operatively coupled to the movable arms; a second pair of arms pivotable about the pins; and zero-setting devices. The zero-setting devices include two members coupled to a shaft rotatable by a control lever. In a first position of the control lever the members are locked and the gauging head is in gauging condition. In a second position of the control lever the members are unlocked and can translate along the shaft permitting to carry out the zero-setting operation of the head because the two movable arms and the second pair of arms engage the members in such a way that the arms can rotate about the pins while maintaining a determined setting of the transducers.

Gauging head for checking dimensions of workpieces

Plug gauge for checking the diameter of a bore, including two movable arms with relevant feelers and a protective body defining two holes for the passage of the feelers. A sealing gasket seals the space between the holes of the protective body and the feelers, preventing the entry of foreign matter, such as chips and coolants, into the protective body.

Plug gauge for checking dimensions of bores of mechanical parts

A plug comparator for checking the diameter of holes of mechanical parts comprising a support, a movable measurement unit and a protection casing. The movable measurement unit comprises two movable arms bearing respective feeler elements which come into contact with the part to be checked. A position transducer detects the position of the movable arms and is connected by an electric cord to an electric supply and indication group. The casing has a lower base with a frustoconical seat for the fitted housing of a closure plate. The closure plate has a cut in diametral direction which subdivides it into two adjacent portions connected by a third portion which is elastically yieldable so as to permit fitting the closure plate in the frustoconical seat.

Plug comparator for checking the diameter of holes

A probe for checking linear dimensions comprising an arm movable along two opposite directions with respect to a support, a pair of electrical contacts fixed with respect to the support and a pair of flexible laminae having first ends connected to the movable arm and carrying at second ends a pair of movable electrical contacts, which--in rest conditions--are closed against a relevant one of the fixed contacts. An element fixed to the movable arm is adapted to cooperate with two surfaces coupled to the laminae next to the movable contacts, for causing, upon displacements of the movable arm from a rest position, release of either of the movable contacts from the corresponding fixed contact.

Probe for checking linear dimensions

A manual plug comparator for checking the diameter of holes of mechanical parts, comprising a support, a movable measurement unit and a protective casing. The movable measurement unit comprises two movable arms respectively bearing feeler elements which come into contact with the parts to be checked. A position transducer detects the position of the movable arms and is connected by an electric cord to an electric supply, detection and indication group. A base plate fastened to the casing has an opening adapted to permit the introduction of air under pressure into the plug. The flow of air passes through the inside of the plug, removing any foreign matter and emerges through other openings provided in the support.

An automatic gauge for checking diameters of holes of a mechanical piece comprising plug gauges having protection nosepieces adapted to enter into the holes, a slide carrying the plug gauges, and a hydraulic device for displacing the slide; the contact between the nosepiece of a plug gauge and the piece, caused by errors in the machining or in the positioning of the piece, making a circuit which controls stopping of the slide for preventing the plug gauges from being damaged.

Gauge for checking features - like linear dimensions - of a mechanical

A gauge for checking linear dimensions of mechanical pieces, comprising a differential transformer transducer including a first member, substantially cylindrical, which supports a core, a second member, substantially cylindrical, which houses electric windings, and a sealing bellows having its ends fixed to the first and the second member, respectively. The two members are mutually movable and the electric windings provide a measurement signal representative of the position of the core with respect to the second member. The ends of the bellows are coupled to annular seats defined in the first and the second members, with a coupling which generates substantially compressive stresses at said ends.

A plug comparator for checking the diameter of holes in mechanical parts, having a movable measurement unit comprising two movable arms bearing respective feeler elements which come into contact with the part to be checked. A position transducer detects the position of the movable arms and is connected by an electrical cord to an electrical supply and indication group. The movable unit comprises a single member of stamped plate having two portions which constitute the arms. The two portions have two sets for the ends of a spring which act on the arms, two seats for two mutually movable elements of the transducer, seats for the feeler elements and for devices for locking the feeler elements, and stop elements which limit the movements of the arms towards each other.

A manual plug comparator for verifying the diameter of holes of mechanical parts, having a central support plate which supports a movable measurement unit, a protective and centering casing and a handle. The movable measurement unit comprises two movable arms each bearing a feeler, which feelers come into contact with the part to be checked. An electric cord terminating in a connector makes it possible to connect a position transducer which notes the position of the movable arms to an electrical supply, detection and indication group. A cord-holder device is fastened to one end of the handle in a removable manner. The handle has an opening which, after the removal of the cord-holder device and the detachment of the handle from the support plate, makes it possible completely to remove the handle from the cord and the connector.

Growing community of inventors

Monteveglio, Italy

Narciso Selleri