摘要:
An apparatus for checking the integrity of tools includes an optoelectronic system (7) with a laser beam (21), a base (6) movable along a longitudinal direction (X) for enabling displacements between tool and optoelectronic system and a device for checking the mutual position including, for example, a transducer (9,10). A sensor (22) of the optoelectronic system detects the interruption of the beam and, on the basis of the transducer signal at said interruption and on the comparison with a known value, the integrity of the tool is determined. A coupling mechanism (24) of the optoelectronic system coupled at the base enables oscillations of the former along a transversal reference surface, that define a sensitive delimited area (33). The oscillations are controlled by means of a motor (26) and interruptions of the beam are detected and signalled by the sensor the moment that the end of the tool interferes with the sensitive delimited area.
摘要:
An apparatus for checking the integrity of tools includes an optoelectronic system (7) with a laser beam (21), a base (6) movable along a longitudinal direction (X) for enabling displacements between tool and optoelectronic system and a device for checking the mutual position including, for example, a transducer (9,10). A sensor (22) of the optoelectronic system detects the interruption of the beam and, on the basis of the transducer signal at said interruption and on the comparison with a known value, the integrity of the tool is determined. A coupling mechanism (24) of the optoelectronic system coupled at the base enables oscillations of the former along a transversal reference surface, that define a sensitive delimited area (33). The oscillations are controlled by means of a motor (26) and interruptions of the beam are detected and signalled by the sensor the moment that the end of the tool interferes with the sensitive delimited area.
摘要:
An apparatus for checking thickness dimensions in a semiconductor wafer (1) during grinding operations includes an optical probe (3) which transmits infrared radiations on the surface (2) being machined of the wafer (1), and detects beams that are reflected by said surface, by an opposite surface (2′) of the wafer and/or by surfaces (2″, 2′″) separating different layers in the wafer. The beam of emitted and reflected radiations travels along a path (4) with known and constant discontinuities, in part through the air (15) and in part through a cushion (30) of low flow liquid, which flows with substantially laminar flow. A support and positioning element (7) for the optical probe includes hydraulic ducts (22,25) that generate the liquid cushion. A method for checking the thickness dimensions includes the generation of the liquid cushion at the path along which the beam of emitted and reflected radiations travels.
摘要:
A touch probe (1;1′;1″;1′″) for applications in machine tools or measuring machines includes a support frame (2) with a protective casing (3), and a movable armset (5) with a feeler (11) to touch a part to be checked (13). The probe includes a detection device (23) with a laminar piezoelectric transducer (25) made of polymeric material, such as polyvinylidene fluoride, which is connected to the support frame and fixed at a bearing and locating area (7), on which the movable armset rests in a position defined by an isostatic rest system (17). Conditioning electronics (30) connected to the support frame include processing means for processing a force signal (M) provided by the detection device, comparing it with a threshold value (S) and generating a touch signal (T). The conditioning electronics include differential charge amplifiers (3) and a processing system (55) to dynamically vary the threshold value depending on the most recent values of the force signal detected.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A head for the linear dimension checking of mechanical pieces including a casing, an arm carrying a feeler for touching the mechanical piece to be checked, a fulcrum for enabling displacements of the arm with respect to the casing and a transducer for providing signals depending on the position of the arm with respect to the casing. Various components of the head can be adjusted and/or replaced from the exterior of the casing. The transducer is of the inductive, half-bridge type, with multiple windings. An integral element for the electric connection to a processing unit includes the windings of the transducer, a cable and a connector. A checking apparatus, including at least a gauging or measuring head, includes a stationary structure and at least a support structure for the head, coupled to the stationary structure in an adjustable and removable way.
摘要:
A gauge for checking linear dimensions of mechanical parts comprises a support, a movable gauging arm, a transducer coupled to the movable arm and the support, and a helical spring defining a longitudinal geometrical axis and having a first end in abutment with the movable arm and the second end in aubtment with a movable element of an adjustment device for adjusting the force applied by the spring to the gauging arm, the device comprising a screw coaxial to the spring and arranged within the spring coils, and a stanchion which controls a translation movement of the movable element along an axis substantially coinciding with the spring axis, translation movement of the movable element changing the axial length of the spring and, consequently, the force it applies to the gauging arm.
摘要:
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.