Abstract: A piston is displaced by a pressure fluid supplied to a chuck body, whereupon a pair of first and second fingers that constitute a gripping member are operated to open and close along a base body. Further, a shaft-shaped bobbin is inserted through the interior of the first and second fingers, and a coil is wound around a small diameter portion of the bobbin. Accompanying opening/closing operations of the first and second fingers, an opening/closing amount thereof is detected based on a change in impedance of the coil.

Abstract: Exemplary embodiments relate to a chuck assembly. The chuck assembly may include a chuck having a first channel having a fluid circulating therein, and a temperature control system adapted to maintain a temperature of the fluid within a first temperature range and vary the maintained temperature range of the fluid to a second temperature range from the first temperature range.

Abstract: A process and apparatus for producing screw threads in hard material workpieces with a series of taps. The present invention employs a threaded bore formed in a bracket assembly to align and position multiple taps on a rotary machine. The taps are used in sequence to cut threads progressively deeper into a substrate. The present invention provides a method of aligning and orienting each progressive tap to begin its cut at the same initial starting point.

Abstract: A chuck for use with a manual or powered driver having a drive shaft, the chuck including a body having a nose section and a tail section, the tail section configured to rotate with a drive shaft of a driver and the nose section having an axial bore formed therein, plurality of jaws disposed within the body in communication with the bore, each of the jaws having a jaw face formed thereon for engagement with a tool shaft, and a visual indicator disposed on the body and including a surface on which is defined a visual indicia that is in operative communication with the jaws so that movement of the jaws to a predetermined position with respect to the bore exposes the indicia to view from outside the chuck and so that movement of the jaws from the predetermined position blocks the indicia from view from outside the chuck.

Abstract: In a power-operated chuck (1) with clamping jaws (3) that are guided so they can move radially within a chuck body (2) and are in a drivable connection via intermediate elements with a clamping piston (4) upon which a hydraulic fluid can act in one or both directions and which is inserted in the chuck body (2) in such a way that it can move axially, a pressure sensor (41) installed in the chuck body (2) is provided in order to monitor the hydraulic fluid pressure existing in the pressure chambers (7 and 8) assigned to the clamping piston (4), the pressure sensor (41) being connected to one or both pressure chambers (7, 8) via hydraulic fluid channels (42, 43). Furthermore, the pressure sensor (41) has a receiver assigned to it which is connected to a unit (45) for evaluating the signals received from the pressure sensor (41).

Abstract: An integrated power chuck assembly for a lathe has a hollow lathe spindle of a diameter sufficient to accommodate at least the actuating cylinder and a multiple medium feed device and preferably at least part of the stroke-control device which can include at least one sensor for the position of the piston.

Abstract: A graduated rotation control chuck assembly includes a base, a holding-down rod axially slidably mounted in the base, and a graduated rotation control unit, the graduation unit including a rotary shaft, mounted in the base and axially aimed at the holding-down rod to hold with the holding-down rod the workpiece to be processed, the rotary shaft having a first contact portion and a second contact portion, a first piston rod, and a second piston rod axially inserted through the first piston rod and mounted with the first piston rod in the base and being alternatively reciprocated against the first contact portion and second contact portion of the rotary shaft to rotate the rotary shaft step by step at a fixed angle per step.

Abstract: A work piece holder with clamping and rotation mechanisms in a support. A holder or brake exists next to a collet and sleeve assembly to restrain the assembly from rotating. Hydraulic pumps and connections operate on the mechanisms for the clamping and rotating actions. An electronic controller is connected with the mechanisms and operates the system in a sequence for selective machining on the work pieces.

Abstract: An integrated power chuck assembly for a lathe has a hollow lathe spindle of a diameter sufficient to accommodate at least the actuating cylinder and a multiple medium feed device and preferably at least part of the stroke-control device which can include at least one sensor for the position of the piston.

Abstract: The invention concerns on the one hand a gripping device (10), particularly for automatic printing and/or inserting machines, with a first and second gripping element (22, 24) of which at least one gripping element (22) can be moved relative to the other gripping element (24) to grab sheet-like materials such as printed pages as well as with a measuring device (42) for the recording of at least one position of the gripping elements (22, 24) towards each other, and on the other hand a method for recording a relative position of gripping elements within a gripping device.

Abstract: An electrical contact, preferably made from a gold-plated, beryllium-copper flat stock which allows radio-frequency signal to pass with low noise, is provided within a housing. The electrical contact has two arms for contact with two external circuits. The electrical contact further has a pivot for allowing the electrical contact to adjust within the housing. The housing supports the electrical contact and is provided with a pivot point, such as a non-conducting rubber tip, for meeting the pivot of the electrical contact. The housing combined with one or more of the electrical contacts results in a testing port especially suited for providing high frequency communication between an electrical testing fixture and a device under test, such as a high-frequency hybrid integrated circuit.

Abstract: A method is disclosed of controlling a hydraulic chuck of a rotary machine tool, the chuck clamping a workpiece to be machined and being actuated by a double-acting clamping/unclamping actuator. A clamping pressure controlled in accordance with a clamping pressure set point is applied to at least one chamber of the actuator and the clamping pressure is maintained in the corresponding chamber if the control pressure upstream of the actuator suddenly falls due to a malfunction. The clamping pressure is controlled by a closed loop and is modified in the chamber to disable the aforementioned maintaining of the pressure for a predetermined time period in response to an operator request to modify the clamping force applied to the workpiece. The disabling is being at least equal to the time necessary for the control system to stabilize.

Abstract: A plurality of clamping motion elements with clamping jaws are moved out of an initial position towards a workpiece under a low operating pressure and caused to bear thereagainst. When all the clamping jaws bear uniformly against the workpiece, a full clamping pressure is applied to clamp the workpiece fast in position.

Abstract: The present invention relates to an electrically driven chuck for holding a chuck of a machine tool, wherein an electrically driven chuck which has no need of any driving means to be exclusively used for a holding chuck, very simplified, and freely adjustable.Chuck fixing means 40 is locking means for locking a chuck body on a headstock 1. Position-deciding pin driving means 42 includes position-deciding part 43 which has piston 44. The insertion of position-deciding part 43 is inserted into position-deciding hole 41 when pressured air is supplied within cylinder 46. When built-in motor 4 is rotatively driven, both main spindle 2 and scroll 17 are rotatively driven, and jaws 30 move to hold or un-hold a work in the radial direction.

Abstract: A pickup chuck which includes a body defining a fluid flow path and a first recess for receiving a semiconductor chip package, at least two chip contact members extending out of the body into the recess, each of which being independently movable in a first direction which is out of the body and in a second direction which is into the body, springs biasing the members into the first direction, flanges limiting movement of each member into the first direction, and one or more heat dissipation fins located within the fluid flow path and engaged with the members to conduct heat therefrom.

Abstract: A chuck drive system, especially for a rotating clamping device of a machine tool, includes a rotating chuck cylinder, a stationary frame positioned adjacent the chuck cylinder, and a piston which subdivides the cylinder into two pressure chambers and is formed with a piston rod having one end rotatably supported in the stationary frame. Fluid under pressure is supplied to the pressure chambers, whereby check valves are positioned in the passageways to the pressure chambers to maintain the fluid pressure in the pressure chambers. In order to monitor the fluid pressure in the pressure chambers, a pressure monitoring unit is provided which includes pressure sensors that are respectively assigned to the pressure chambers for determining the fluid pressure in the pressure chambers separately and independently from one another.

Abstract: A chuck comprising a chuck body and monitoring electronics for detecting chuck faults fitted within the chuck body. A wireless transmission means is provided on the chuck body for transmitting signals from the monitoring electronics. The chuck has a dynamo having a housing fixed in the chuck body and a rotatable rotor having a mass for rotating relative to the housing when the chuck rotates due to an inertial moment of the mass to produce electric energy to power the monitoring electronics. Optionally provided is an electric energy storage means for storing energy from the dynamo and powering the monitoring electronics to provide for constant operation of the monitoring electronics.

Abstract: A data carrier in the form of an elastic ring segment has a radially outwardly facing surface to which the data providing tool information, are applied for example by printing. The ring segment has at least one radially inwardly effective connector element that forms a snap-on connector for securing the data carrier in an elastic, releasable manner to a connector area of a tool carrier to provide an elastic, interlocking form-fit between the data carrier and the tool carrier. Thus, the data carrier can be easily exchanged or replaced in accordance with the type of tool carried by the tool carrier.

Abstract: A chuck assembly for engaging the inner surface of a hollow substrate including: (a) a body defining a hole, wherein the hole is positioned to be in communication with the air inside the substrate; and (b) a gas pressure regulating apparatus coupled to the hole for regulating the gas pressure inside the substrate.

Abstract: A tool holder comprises a receptacle having one end connectable with a machine spindle, to a receptacle and the like and an opposite end, a head provided on the opposite end and having a coaxial cylindrical head opening, a housing received non-rotatably and axially longitudinally displaceable in the head opening and having a coaxial cylindrical housing opening, a quick exchange insert for a tool insertable in the housing opening and coupleable with the housing, and an inner signal device reacting to a relative movement between the head and the inserted quick exchange insert to produce a disturbance signal which identifies a damaged or a destroyed tool.

Abstract: An adjustable yarn package holder which can support one of a plurality of variously sized yarn packages on a creel. The yarn package holder includes a pair of longitudinally adjustable elongate support arms which define a mandrel for receiving the core of a yarn package. The elongate support arms may be selectively moved between a first closely spaced apart position and a second widely spaced apart position to define different cross-sectional sizes of mandrels for receiving yarn packages having cores of different diameters. The support arms are fixed to respective guide arms which slideably engage opposing guide edges of a base plate. The guide arms preferably include opposing gear racks, and a rotatable pinion gear is positioned between and in engagement with the opposing gear racks. For moving the pinion gear, a pair of lever arms are fixed to and extend radially from the pinion gear, and the lever arms include provision whereby they may be releasably locked in a selected rotational position.

Abstract: A lap blank and holder assembly includes a lap blank having two spaced apart flat surfaces separated by a given thickness and formed from a material capable of compressing about a member inserted into it. The holder has a projection extending outwardly from a front face thereof and is inserted into the material making up the lap to secure it against rotational and shifting movement while being cut in a surfacing machine. This arrangement further allows the assembly to be placed as an assembly in a finishing machine for subsequent polishing of a cut lens surface in an off-axis polishing procedure.

Abstract: A compound locking structure and applied device of mechanical and magnetic suction for fixture with a bearing face for workpiece being made into a magnetic sucking plate structure to enable the fixture to have mechanical chucking and magnetic sucking functions, and both functions can be operative alternatively or simultaneously subject to the control device.

Abstract: An improved machine tool having means for automatically sensing axial movement of the jaw members relative to the collet housing and for adjusting the axial position of the collet to automatically compensate for the jaw movement to allow radial gripping of the workpiece with no axial movement.

Abstract: A lap blank and holder assembly includes a lap blank having two spaced apart flat surfaces separated by a given thickness and formed from a material capable of compressing about a member inserted into it. The holder has a projection extending outwardly from a front face thereof and is inserted into the material making up the lap to secure it against rotational and shifting movement while being cut in a surfacing machine. This arrangement further allows the assembly to be placed as an assembly in a finishing machine for subsequent polishing of a cut lens surface in a polishing procedure.

Abstract: In a method and apparatus for centering a rotary body such as a motor vehicle tire the rotary body is put into a centered position by means of a plurality of centering means which engage the circular periphery of the rotary body at distributed positions around the periphery thereof and which are acted upon by a centering force. The centering force acting on the centering means is set to be proportional to the diameter of the rotary body.

Abstract: Apparatus for forming at least one mounting opening in a vehicle wheel that includes a circumferential array of locating jaws movable between an outer position and an inner position radially inward of the outer position in which the locating jaws engage the rim portion of the wheel positioned within the locating jaws. An upper die is reciprocable for forming at least one mounting opening on a first axis in the disc portion of a wheel engaged by the locating jaws. Position sensors are operatively coupled to the locating jaws for providing electrical sensor signals as a function of position of the locator jaws relative to the axis of the mounting openings formed in the wheel. The sensors are coupled to electronics for indicating position of the locator jaws relative to such axis.

Abstract: A workpiece support tool is disclosed for use with in providing an infinite variety of positions to receive and engage workpieces of differing shapes and sizes. The workpiece support tool provides precise support and positioning of the workpiece with respect to an operational centerline. The support tool includes a plurality of radially moving jaw members having support surfaces for supporting the inner circumference of the workpiece. The jaw members are expanded and contracted in solely radial movement through driving forces imparted by a position encoded servo drive motor.

Abstract: A centering device in a machine tool having a chuck for clamping a work includes a clamp device for clamping and centering the work at a different position with respect to the chuck. The clamp device has an actuator driven by a pressure medium and a holder operable by the actuator for clamping the work with a pressure corresponding to the pressure of the pressure medium and for releasing the work. A control device is provided for controlling the pressure of the pressure medium to a value which is appropriate to center the work by the clamp device and which is previously determined according to a diameter of the work to be clamped.

Abstract: A workpart chuck centering mechanism moves towards the axis of rotation of the chuck as the chuck rotates in an eccentric non-centered position. The centering mechanism includes two independent shoes. Each shoe is driven by a servo-motor and encoder. The two shoes function in a cooperative manner to center the workpart. A sensing device monitors any eccentric movement of the workpart and controls the positioning of the shoes. The two shoes and the sensing device are mounted on a base which can pivot about the chuck axis. The directions of movement of the respective shoes are displaced 90.degree. relative to one another and intersect at the chuck axis.

Abstract: In an adjustable chuck for gripping workpieces of different sizes, three jaws are mounted for relative movement. A hydraulically driven mechanism is operable selectively for closing the jaws to grip a workpiece and for opening the jaws to free the workpiece. Two strain gauges on one of the jaws sense the gripping force applied by the jaws to the workpiece. A computer, which responds to the strain gauges, coacts with a control relay and with hydraulic valves to control flow of hydraulic fluid into and from the closing and opening mechanism. A system comprising a plurality of such chucks is contemplated, in which one computer coacts therewith to control the closing and opening mechanism of any selected chuck of the system, and which adjusts itself for minor variations among the system chucks.

Abstract: A workpart chuck centering mechanism moves towards the axis of rotation of the chuck as the chuck rotates in an eccentric non-centered position. The centering mechanism includes two independent shoes. Each shoe is driven by a servo-motor and encoder. The two shoes function in a cooperative manner to center the workpart. A sensing device monitors any eccentric movement of the workpart and controls the positioning of the shoes. The two shoes and the sensing device are mounted on a base which can pivot about the chuck axis. The directions of movement of the respective shoes are displaced 90.degree. relative to one another and intersect at the chuck axis.