Abstract: A system for detecting linear dimensions of mechanical workpieces includes a checking probe with detecting devices, a power supply and a remote transceiver unit. A stationary transceiver unit is located at a distance from the probe, and is adapted for wireless receiving and transmitting to the remote transceiver unit signals, for example, coded optical signals. The stationary unit transmits activation and/or deactivation signals to the probe for controlling the full power supply of the probe circuits, and/or the return to a “stand-by” power state. The remote transceiver unit includes devices adapted for achieving an automatic sensitivity control and other attenuation devices for preventing unwanted consumption of the probe battery energy due to noise signals. Such noise signals could come from fluorescent lamps, for example, causing improper activation and deactivation of the probe circuits.

Abstract: A checking head (T) includes a casing (1), an arm (2) with a feeler, movable with respect to the casing, and a sensor, such as an inductive position transducer (5). An electronic identifier (27) is fixed to a frame coupled to the head (T), for storing identifying data relevant to the head, information relating e.g. to the configuration and calibration features of the head, and/or compensation values obtained in the 41 course of the calibration phase carried out on a suitable testing equipment.

Abstract: A head for the linear dimension checking of pieces in machine tools or measuring machines with a support structure (1), a movable arm-set (4) including an arm (6) carrying a feeler (8) for contacting the piece (37) to be checked, a spring (17) arranged between the support structure and the movable arm-set, a first annular surface (19) fixed to the support structure, a second annular surface (18) fixed to the movable arm-set and urged by the spring into contact with the first annular surface and an electric detecting device. The detecting device includes a ring (16) made of electrically resistive material that defines the first annular surface and another ring (13) made of electrically resistive material that defines the second annular surface, a circuit (21) for applying a difference of potential across two points (22, 23) of the first ring and another circuit (30) for detecting the difference of potential across two points (24, 25) of the other ring.

Abstract: Head for checking linear dimensions of parts in machine tools or measuring machines, with a casing, a movable arm-set including an arm carrying a feeler for contacting the part to be checked, a biasing device arranged between the casing and the movable arm-set, a detecting device for providing a signal depending on the position of the movable arm-set, and two constraining systems—between the casing and the movable arm-set—both totally with force closure under the action of the biasing device, that eliminate, in a univocal way, the six degrees of freedom of the movable arm-set, one of the two constraining systems featuring a structure with rotational symmetry.

Abstract: 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.

Abstract: An optoelectronic apparatus for the dimension and/or shape checking of pieces, more specifically pieces with complex tridimensional shape, as the supports for magnetic read/write heads (33, 47, 63) for hard disk storage units, comprises a base (1) with two guide elements (7, 9) to which there is coupled a slide (11), movable in a longitudinal direction along the guide elements (7, 9), and a system (31) for locking and referring the piece (33, 47, 63) to be checked. The slide (11) supports a rotary table (13), to which there is fixed a support (15) for an optoelectronic measuring system. Rotational displacements of the rotary table (13) about an axis parallel to the guide elements (7, 9) make the optoelectronic measuring system oscillate substantially in a plane perpendicular to said axis for optimizing the reciprocal arrangement between the components (75, 77) of the optoelectronic measuring system and the piece (33, 47, 63) in the course of the checking.

Abstract: A gauging or measuring head for the linear dimension checking of mechanical pieces, including a casing (1), an arm (49) carrying a feeler (67) for contacting a piece to be checked, a fulcrum (74), coupled to the casing (1) and the arm (49), for enabling displacements of the arm (49) with respect to the casing (1), a return spring (95) for keeping the feeler (67) in contact with the piece during the checking, a device (98, 100) for retracting the arm (49) and a position transducer providing signals depending on the position of the arm (49) with respect to the casing (1). The fulcrum is made of a deformable element (74) including two coupling blocks (81, 83) and three laminae (75, 77, 79) permanently secured to the blocks (81, 83), and substantially arranged in two different planes of a sheaf of planes.

Abstract: Gauging head and apparatus for the linear dimension checking of mechanical pieces comprising an integral element (1) that defined an arm (5) carrying a feeler (25), a reference portion (3), and a fulcrum (13) that enables rotations of arm (5) with respect to the reference portion (3), and a differential transformer position transducer with a cylindrical shaped casing (35; 82), carrying the windings (34; 83), fixed to the reference portion (3), and a ferromagnetic core (32; 84) movable together with the arm (5). The integral element (1) is locked in an adjustable way to a support (67), by means of the cylindrical casing (35; 82). The integral fulcrum is achieved by work hardening the material and subsequently grinding it.

Abstract: A linear gauging head, or cartridge head, comprises a casing, a spindle movable with respect to the casing along a longitudinal axis, a feeler coupled to a first end of the spindle and a differential position transducer with windings, fixed with respect to casing, and a core coupled to a second end of spindle. The spindle is guided by recirculating ball bushings with rolling elements that cooperate with the spindle and thus allow its displacement with respect to the casing.

Abstract: A system for numerical control machine tools comprises contact detecting probes, powered by a battery, that transmit radio-frequency signals to associated interfaces. When the probes are not being utilized for checking cycles, they are in a low-energy consumption state, in other words the circuits of the probes are only partially powered. When the need arises, the circuits of a probe are fully powered by the battery, by a radio-frequency activation signal. The procedure for activating a selected probe includes the sending of a generic activation signal from the associated interface, the transmitting of an identification signal from all the probes that have been activated by the generic signal and the sending of a generic confirmation signal from the interface in reply to the identification signal of the selected probe.

Abstract: A method and an associated apparatus for the dimension checking of the timing system of an internal combustion engine, in particular for checking the clearance existing between the cams of the camshaft and the relevant valves in the cylinder head, by dimensional measurements of the cylinder head and the camshaft separately, and processing, in a storing, processing and display unit, the dimensional measurements for evaluating how the camshaft actually positions itself with respect to the cylinder head on which it is mounted, in the course of the normal running of the engine.

Abstract: A linear gauging head, or cartridge head, comprises a casing (1), a spindle (10) movable with respect to the casing along a longitudinal axis, a feeler (12) coupled to a first end of the spindle and a differential position transducer with windings (13, 14, 15), fixed with respect to casing (1), and a core (16) coupled to a second end of spindle (10). The spindle is guided by recirculating ball bushings (18, 19) with rolling elements (29) that cooperate with the spindle and thus allow its displacement with respect to the casing.

Abstract: An apparatus for checking the diameter of crankpins (18) of a crankshaft (34) in the course of the machining in a grinding machine comprises a first arm (9) rotating with respect to a support (5) arranged on the grinding-wheel slide (1) of the grinding machine, a second arm (12) rotating with respect to the first, a reference device (20) carried by the second arm and a measuring device (16, 17, 40-45) associated with a reference device. A guide device (21), fixed to the reference device (20), enables the apparatus to engage a crankpin, in the course of the orbital motion of the crankpin, and limit the displacements of the first arm and those of the second arm when a control device (28-30) displaces the apparatus to a rest position.

Abstract: A display unit, connected to a measuring head, has a substantially right parallelepipedon shaped casing, considerably smaller in width with respect to length and depth, with a front face having dimensions corresponding to length and width, on which there are two display devices, substantially one analog and the other digital, placed adjacent to and arranged along the length of the front face. A programming and control keyboard is arranged at a base of the casing, and a device is associated with the casing for coupling the display unit, particularly small in overall dimensions in relation with functionality, to an external support.

Abstract: A plug gauge for checking shape errors, in particular, the roundness of a valve seat. The plug gauge comprises seating surfaces adapted for cooperating with the surface of the valve seat, and a pneumatic circuit with an annular nozzle at the seating surfaces. The gauge comprises two coaxial cylindrical elements, one of the two housed within the other, that can reciprocally translate in an axial direction and that comprises associated resting surfaces, such that both cylindrical elements may rest on the seat surface to be checked. The annular nozzle is substantially defined by an internal and an external cylindrical portion of said two reciprocally movable elements.

Abstract: A system for transmitting a radio-frequency signal from a contact detecting probe (1), powered by a battery (4), to a remote interface (11), that includes the transmitting, by way of coded serial signals, of messages containing information regarding the state of the probe, the level of charge of its associated battery, and other possible control and identification information. In order to guarantee the repeatability of the delay time that cannot be avoided in the transmission of the change of state of the probe, the bit periods of the single bits that form the message are changed, with respect to a nominal bit period (TN) of the serial signal, on the basis of the delay or the advance at which there occurs the change of state, with respect to a theoretical instant (C0) pre-set within the nominal bit period.

Abstract: A microfinishing machine tool comprising an abrasive belt and reference and clamping shoes for the machining of a cylindrical surface of a workpiece. In order to perform a checking, in the course of machining, of dimensions and geometrical characteristics on the cylindrical surface, a detecting device comprises a support element coupled to a shoe in a central limited area and two pairs of gauging heads coupled to the support element for detecting diametral dimensions at two different cross sections of the cylindrical surface. The shoe comprises seats and openings for housing the detecting device.

Abstract: An apparatus for checking linear dimensions of a workpiece (10) according to the shadow casting technique, including a bed (1), a first support structure (5, 6) sustained by the bed for supporting the workpiece, a second support structure (4), optical sources (22-25) coupled to the second support structure (4) for generating associated beams of light, a plurality of linear photosensitive devices (26-29) coupled to the second support structure (4) for receiving the beams of light after they have been intercepted by the workpiece, and detecting circuits (20, 21) connected to the photosensitive devices (26-29). The optical sources (22-25) are arranged in two units (22, 23; 24, 25) at opposite sides with respect to the workpiece, and the photosensitive devices (26-29) are also arranged in two units (26, 27; 28, 29) located at opposite sides with respect to the workpiece.

Abstract: A measuring system for a numerical control machine tool comprising a detecting head (3), for contacting a workpiece (1) to be checked and for transmitting an optical coded signal (8) to a remote transceiver unit (11) that, in turn, can transmit an optical switch on signal (10) to the head (3). The transceiver unit (11) is connected, by means of a cable (45) including separate lines (43, 44) for the transmitted and received signals, to an interface unit (12), in turn connected to a computerized numerical control unit (13). In the event that faults occur in the transmission between the head (3) and the interface unit (12), a test takes place so as to identify in which part of the system the fault is located. A test signal is generated by suitable means (38) in the interface unit (12), transmitted from the transceiver unit (11) towards a reflecting surface (16), reflected by the latter, received by the transceiver unit (11) and sent to the interface unit (12).

Abstract: An apparatus is disclosed for checking the geometric characteristics of mechanical objects having rotational symmetry, such as shafts or bushings. A longitudinal support element defines a longitudinal axis and first reference surfaces, at least one modular coupling element is removably coupled to, and is adjustable longitudinally along, the longitudinal support element and provides second reference surfaces which cooperate with the first reference surfaces to align a linear guide portion transversely of the longitudinal axis. A fastener secures the modular coupling element, which removably supports a gauging device, to the longitudinal support element and a locking/unlocking device cooperates with the gauging device and guide portion for locking the gauging device to the modular coupling element.