Abstract:
Gauging head and apparatus for the linear dimension checking of mechanical pieces comprising an integral element (1) that defines 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 (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 dimensions and other geometrical features of pieces like shafts (20) or bushings (120) comprises support and reference devices (21; 110) for the piece, and checking devices (40; 70; 100; 119). Modular elements (5), equal to one another, are secured to two longitudinal cylindrical bars (1, 2) arranged one over the other. Linear guide portions (7) of the modular elements lie transversally, parallel to one another, and both the support and reference devices (21; 110) and the checking devices (40; 70; 100; 119) are adjustably connected to the linear guide portions (7). The checking devices comprise integral structures with movable arms (45; 73; 129) that touch the piece to be checked, and gauging heads (50, 85, 101, 134) actuated by the movable arms.
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. Each message comprises a number of bits that represent coded variables, and a start sequence (ST), clearly distinguishable with respect to the coded variables, and enabling the interruption of serial signals the transmission of which is in progress.
Abstract:
An apparatus for transporting elongated mechanical pieces, in particular connecting rods (B), comprising supporting bars (15, 15') for supporting the larger ends (T) of the connecting rods (B), the latter being arranged side by side along a longitudinal feed direction, and displacement means (20-38) for the step by step feed of the connecting rods (B). In order to prevent undesired displacements that could cause the pieces (B) to fall from the supporting bars (15, 15'), the latter have sawtooth profile resting surfaces (16, 16') for constraining the position of the big ends (T) of the connecting rods (B) on the bars (15, 15'). Lateral displacements of the connecting rods (B) are prevented by a Vee guide surface for the resting of the small ends (P) of the connecting rods (B).
Abstract:
An apparatus for checking the outer surface of conical parts (39) comprises two substantially cylindrical feeding rollers (12, 13) adapted to support a plurality of parts (39), arranged in a row. The feeding rollers (12, 13) define convergent geometrical axes about which the rollers rotate in the same direction and have external surfaces made of materials with different coefficient of friction. The rotation of the feeding rollers (12, 13) causes the parts (39) to rotate about their own geometrical axes and the row of parts (39) to perform a continuous advance motion. The parts (39) are dynamically checked by a non-contacting probe (37) arranged substantially in correspondence with a determined cross-section of the feeding rollers (12, 13). The distance of the probe (38) from the surface of the parts (39) passing through said cross-section has a value lying within a determined range.
Abstract:
A system for numerical control machine tools (M1, M2, M3) comprises contact detecting probes (S1a,...,S3c), powered by a battery (24), that transmit radio-frequency signals to associated interfaces (I1, I2, I3). 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 (S1a) are fully powered by the battery (24), by means of radio-frequency activation signals. The procedure for activating a selected probe (S1a) includes the sending of a generic activation signal (AT) from the associated interface (I1), the transmitting of an identification signal (ID) from all the probes that have been activated by the generic signal and the sending of a generic confirmation signal (EN) from the interface in reply to the identification signal of the selected probe.
Abstract:
A microfinishing machine tool comprising an abrasive belt (18) and reference and clamping shoes (6, 8) for the machining of a cylindrical surface (1) of a workpiece (2). In order to perform a checking, in the course of the machining, of dimensions and geometrical characteristics (for example, possible taper errors) on the cylindrical surface (1), there is foreseen a detecting device (30) comprising a support element (32) coupled to a shoe (6) in a central limited area (74, 88) and two pairs of gauging heads (33-36) coupled to the support element for detecting diametral dimensions at two different cross sections (S1, S2) of the cylindrical surface (1). The shoe comprises seats and openings (82, 84-87) for housing the detecting device (30).
Abstract:
Touch probe with a base unit (2) comprising a casing (5), a movable arm-set assembly housed in the casing and provided with an arm (6) protruding from the casing and a feeler (7) fixed to the arm end external to the casing, and an adjustment and locking device (3) for locking the base unit to a support (4). In order to adjust the position of the feeler, the adjustment and locking device comprises a first (25) and a second (26) reference element with substantially spherical couplings between the base unit and the support and two locking elements (17, 18), coupled to the base unit and to the support, and adjustable along a longitudinal direction. At least the first of the reference elements is adjustable along the longitudinal direction.
Abstract:
An apparatus for checking a camshaft (4), in particular for checking the parameters of the profiles of cams (5-12), comprises means (3, 19, 20, 21) for positioning and axially rotating the shaft, first checking elements (27-39) for determining radial dimensions of cams (5-12) in the course of the rotation, second checking elements (40-47), distinct from the first, for cooperating with a reference portion of the shaft (4) and locating an angular reference position, a rotary transducer (26) for defining said angular position and angular detection positions, and a control unit (63) for receiving and processing signals arriving from the checking devices and from the rotary transducer. For each cam there is memorized (74) and processed (75) a sequence of values (h(i)) pertaining to its profile, there is calculated (76, 77) the value (xBF) of the mutual phase difference with respect to a nominal profile (T), and the actual profile to be checked (H) is inspected with reference to a second nominal profile (T') determined by angularly displacing the nominal profile (T) of an angle equal to the value (xBF) of the calculated phase difference.