Abstract: A deep hole drilling machine having a drill headstock and a drilling carriage, and a drill guide carriage disposed between them, at least two of these three units being displaceable on the machine bed, and the workpiece and/or the drill tube being rotatable. This machine is designed such that differences in workpiece or drill lengths, workpiece inaccuracies and different hole starting and hole finishing movements can be provided for automatically. This is accomplished by providing a length measuring system on each of the displaceable units; the reading made by each measuring system will depend on the position of its unit with respect to a reference point on the fixed unit. A comparator compares the relative positions of the displaceable units, while an evaluating circuit is provided for controlling the movement of at least one of the units on the basis of the readings made after the workpiece and the drill have been inserted into the machine.

Abstract: A drilling device includes a frame with a stationary and a movable upright and a transverse beam which connects said uprights with each other along which a drilling unit moves transversely to the advance direction of the workpiece and is set to provide boreholes in accordance to the center of a standard workpiece of nominal height. The workpiece is transported by a roller table and clamped by the movable upright to define a clamping path. Connected to the movable upright is a lever assembly which transmits the horizontal movement of this upright to a vertical bar. The displacement of the vertical bar rotates a horizontal rod which is linked via a crank arm/lever assembly to a transmission bar moved in horizontal direction upon rotation of the rod. The transmission bar is connected to a correction unit which in response to the determination of the clamping path acts on the drilling unit to adjust the latter in dependence on the actual height of the workpiece.

Abstract: A contact detecting system for detecting the contact of a tool element, supported by a main shaft of a machine, with a workpiece comprises exciting and detecting coil assemblies, an electric power source for supplying a high frequency electric current to the exciting coil assembly to cause the latter to produce an induction current flowing in a loop circuit constituted by the machine shaft, the tool element and a framework of the machine, and a detector unit for generating a detection signal indicative of the actual contact of the tool element with the workpiece when the detector unit has detected the presence of a current component, which has resulted from the induction current generated by the exciting coil assembly, in the output signal from the detecting coil assembly.

Abstract: Both an apparatus and process for providing a coolant flow path in the top former plate of the core of a nuclear reactor are disclosed. The apparatus of the invention generally comprises an elongated tool support member having a tool mounting means for detachably mounting various tools in the vicinity of the top former plate, and a clamp assembly for securing and positioning the tool mounting means over the plate. The apparatus also includes an ultrasonic transducer (or probe) for measuring the thickness of the plate, a rotabroach device having a feed and drive assembly for driving a pilot drill bit and a rotabroach bit toward the top former plate, and a piercing tool for removing the slug formed by the rotabroach bit. In the process of the invention, an alternate coolant flow path is provided in the top former plate by boring a plurality of holes therethrough.

Abstract: A system is disclosed for automatic radial adjustment of a boring tool in a machine tool spindle to accurately size a bore in a workpiece within extremely close tolerances over a wide range of bore sizes.

Abstract: What is proposed is a drilling attachment for use with a machine tool that rotates a workpiece in which the drilling apparatus is moved into an operative position to the workpiece by means of the machine tool slide and is rotated with the workpiece so that a drilling member associated with the rotating drilling apparatus is caused to rotate and to enter the workpiece while the same is rotating.

Abstract: A hole machining device capable of effecting marking and similar operations as well as drilling and reaming. The device comprises driving shafts attached to the body of the machining device, spindles for installing the drills, springs for invariably urging the spindles forwardly, spindle collars that cover the springs and detecting means for detecting the backward movement of the collars.

Abstract: Multispindle-automatic turret lathe comprising a spindle support which is rotatable about a central switching or indexing axis and in which are rotatably mounted a number of work spindles each defining one switching or indexing station of the spindle support.In order to enable the tools which are fitted on the turret being precisely measured in that position thereof in which the tools are required to work a measuring station is provided on the spindle support in like geometrical relation to the indexing axis as the workspindles, said measuring station defining a further switching or indexing station of the spindle support.

Abstract: To reduce dead times and waste of dummy boards necessary for preparing individual packages of stacked boards to be drilled, the latter are loaded on the table in a single stack and are drilled from the top in groups formed of a predetermined limited number of boards, drilling only partially into the next board to be drilled. The drilled boards are carried out of the stack which is reapproached to the drilling head. The drilling restarts by following the impression left by the tool in the preceding cycle on the partially drilled board. The numerically controlled drilling machine includes a table vertically movable to bring the stack against a fixed stop. A slide transversely movable after each drilling cycle engages the already drilled boards and carries them to an unloading support external to the table.

Abstract: The drilling machine comprises a pair of cross slides formed of two parallelepiped blocks of granite connected as a T above a horizontally stationary board carrying table. The transverse block carries two operating heads and, by means of pneumostatic bearings, guides their movement along the X-axis. The other block is guided by the machine frame by means of other pneumostatic bearings. Each head carries a spindle operable to lock and unlock the tool to permit automatic tool replacement from a corresponding tool magazine with provision for checking the integrity of the engaged tool. One of the heads can be disengaged from the X-axis servomotor and connected to the other one at a predetermined distance. Two series of equal printed circuit supports can be drilled simultaneously by using a single package of boards to be cut after the drilling or the etching. Tool changing and tool integrity checking operations can be effected simultaneously for the two operating heads.

Abstract: The control of a tool during a machining operation on a workpiece by means of a numerically controlled device may be interrupted for various reasons. On the occurrence of an interruption the tool is immediately retracted from the workpiece in order to be moved to a retraction position R to avoid marking the workpiece. When the tool is returned to the workpiece, the invention provides a method of moving it so that it converges tangentially towards the workpiece along a curved path, taking up the original tool machining path without marking the workpiece.

Abstract: In effecting positioning of a workpiece relative to a working tool, indexing is carried out by obtaining precision measurement of the relative distance between the workpiece and the working tool by using a laser beam. Positioning can be effected with improved precision and working can be achieved with improved dimensional accuracy.

Abstract: A machine tool system having an adjustable implement mounted in a holder or chuck and moveably positioned relative to a moveable workpiece support, wherein implement adjustments are produced by controlled differential motion between the implement holder and an adjustment fixture on the workpiece support. The support is moved to engage the implement in the fixture, from which state further relative movement unlocks an implement clamp and produces a desired adjustment in the implement. Typical implement adjustment applications would include setting of a boring bar cutting radius (or setting of a measurement gauge dimension). The adjustments can be performed open loop based on prior calibration of implement adjustment versus extent of support motion, or closed loop wherein an initial cut (or measurement) is made by open loop implement adjustment with subsequent adjustments based upon a measurement made of the implements effective cutting (or measurement) dimension.

Abstract: A numerically controlled machine tool having a tool secured to a support for machining a surface of a workpiece. The tool is also used for sensing the workpiece surface for measuring the distance between the workpiece surface and a datum surface. To this end, the tool is at first moved to a position clear of the workpiece surface and an electric circuit between the tool and the workpiece switched on. The tool is then moved toward the workpiece surface by a control system adapted to continually read the position of the tool by means of a counter. When the tool touches the workpiece the circuit is made and produces a signal used to read the instantaneous content of the counter into a computer. The computer determines the difference between the actual and demanded dimension of the workpiece surface and corrects the next machining position of the tool accordingly.

Abstract: A method of determining coordinate system in a machining center in which tool exchange is made after resetting the tool to the mechanical zero point. A reference position is set with respect to a program zero point at a position on a coordinate having the origin coinciding with the program zero point. The mechanical coordinate values of the reference position with respect to the mechanical zero point are computed and determined by making a reference portion of the tool coincide with the reference position. Then, the mechanical coordinate values of the program zero point are computed and determined from the reference position. In the tool exchange, the mechanical coordinate value of the program zero point in the direction of axis of spindle is corrected in accordance with the difference of length between two tools, by reading the data concerning the tool lengths from a tool file storing the tool lengths in the direction of axis of the spindle.

Abstract: In the apparatus a cross-feed head is supported at a rotatable spindle. A cross-feed slide of the cross-feed head is arranged to be displaceable by means of a displacement drive and a displacement mechanism in a cross-feed displacement direction. The rotatable spindle is arranged on a carriage for displacement in a carriage displacement direction transversely with respect to the spindle. Furthermore, a numerical control is provided. In order to be able to adjust the radial position of the cross-feed slide with greater precision a sensor or feeler is fixedly arranged together with the displacement drive at one end of the carriage displacement travel path. An adjusting control or device controls the displacement of the cross-feed slide in conjunction with the sensor and with the displacement drive.

Abstract: Positional information about movable components in a machine system relative to the workpiece is wirelessly transmitted by infrared radiation to a remote receiver. The receiver is operative to convert the infrared signals into electrical signals for controlling operational cycles of the machine system.

Abstract: A leader angle control device comprises two inclinometers for measuring inclination of a leader in two directions, an arithmetic unit for calculating the length of two backstays which support the leader based on the detected inclination of the leader and a control unit for controlling backstay cylinder driving oil.In one embodiment of the leader angle control device, the leader angle is controlled manually to a certain extent before automatic control takes place, whereby the acceleration applied to the leader at the time of shift to automatic control is kept small and then gradually increases, thus enabling smooth control of the inclination of the leader.

Abstract: A process is disclosed for automatically positioning the drill spindle over a workpiece at a predetermined location defining the bore center, wherein the shop drawing and the workpiece bore centers are defined as to their locations in different coordinate systems and wherein the invention provides for calculating and measuring steps to transform between the various coordinate systems. The invention discloses also apparatus for practicing the process by employing a controller-arithmatic unit which carries out the coordination of the plurality of logic circuits and the effecting the use of a programmed performance of the process including the teaching or updating of the program for new bores.

Abstract: In an improved digital readout for machine tools, an apparatus is provided which automatically offsets the digital position display by the radius of the cutting tool. A machinist is thereby enabled to work more rapidly and with reduced chance of making errors.

Abstract: An electrical device for controlling the stroke length of a reciprocating tool carrier of a honing machine by controlling the stroke reversal points of the carrier includes a first compensating circuit for correcting deviations from a predetermined lower reversal point and a second compensating circuit for correcting deviations from a predetermined upper reversal point, the compensating circuits supplying respective reversal point signals to a comparator for comparison with a voltage representing the instantaneous position of the carrier along a stroke path.

Abstract: A numerically controlled machine tool for producing tangential entry into a compensated contour and for the tangential leaving from a compensated contour. The numerically controlled machine tool also produces the interior or exterior rounding of intersections between two contours.

Abstract: A workpiece drilling machine includes to be moved to any of several drilling locations along the workpiece. A plurality of indexing detents is formed along the rail coinciding with each drilling location. A cam follower on the drill carriage is engageable with the detents to coarsely position the drill carriage. An index-cancelling device is associated with each detent and controllable by a preprogrammed input device to determine which of the detents is to be available for engagement by the cam follower. The programmed input device has a visual marking thereon corresponding to the information encoded therein and a visually perceptible status readout is controlled by the index-cancelling means to permit visual verification that the index-cancelling devices are arranged in accordance with the desired pattern.

Abstract: A drillhole centerline determining interposer having a central cavity enables a robot to probe the interposer to learn the location and orientation of the desired drillhole. The interposer is a mushroom shaped device with a planar head and a stem dimensioned to fit snugly in the hole to be drilled. The interposer, in addition to the planar head from which the perpendicular can be calculated through multiple probes, has a central pocket concentric to the interposer stem.The method of using the drillhole centerline determining interposer is to place a number of such interposers manually in position in holes in a master part located in the work envelope of the robot. The robot operator prepositions the probe at an initial position facing the cavity of the interposer for a drillhole locating sequence for the related drillhole. In sequence, the robot moves the probe from the initial position sufficient to clear the edge of the cavity and by multiple probes determines the plane of the interposer surface platform.

Abstract: A drilling machine is provided with a quill feed device for reciprocating a quill, a driving member and a driven member, disposed between a spindle rotatably supported by the quill and a driving source therefor in such a manner as to produce a relative angular displacement therebetween according to magnitude of a load applied on a tool held by the spindle, a detector generating a series of pulse signals correlated to the relative angular displacement between both members, a counter numerically counting the pulse signals generated from the detector in respect of one rotation of the spindle, a memory memorizing numerical data, corresponding to the relative angular displacement while the tool being separated from a workpiece, counted by the counter device, and a comparator for comparing the value memorized in the memory and an actual counted value in the counter.

Abstract: A numerically controlled machine tool having a tool secured to a support for machining a surface of a workpiece. The tool is also used for sensing the workpiece surface for measuring the distance between the workpiece surface and a datum surface. To this end, the tool is at first moved to a position clear of the workpiece surface and an electric circuit between the tool and the workpiece switched on. The tool is then moved toward the workpiece surface by a control system adapted to continually read the position of the tool by means of a counter. When the tool touches the workpiece the circuit is made and produces a signal used to read the instantaneous content of the counter into a computer. The computer determines the difference between the actual and demanded dimension of the workpiece surface and corrects the next machining position of the tool accordingly.

Abstract: A numerically controlled (NC) machine tool has apparatus for automatically positioning and feeding a cutting tool to follow a programmably predetermined path. Sensing devices are provided to detect when the cutting tool suffers an abnormality, such as becoming dull or chipped. The feed devices of the NC machine tool are then commanded, by an arithmetic unit having a memory and by an NC command generating unit, to automatically retreat the cutting tool. It retreats, without interference with the workpiece, to a first position, parametrically determined by the shape and size of the workpiece, cutting tool data for the abnormality, completion and tool exchange positions, and by the nature of the machining operation. This retreat location is a position at which the cutting tool may be replaced. After replacement of the cutting tool, the cutting tool is automatically returned, via the first position, to a second position from which the machining is resumed.

Abstract: A machine tool includes a tool holder supporting a cutting tool and receivable in a tool spindle. A device is provided in the tool holder to be engageable with a work table for adjusting the radial position of the cutting tool by utilizing the relative movement between the tool spindle and the work table. A contact detecting device detects the contact between the work table and the adjusting device. Relative movement between the tool spindle and the work table is caused to adjust the radial position of the cutting tool after the contact between the work table and the adjusting device is detected.

Abstract: A machine tool control system adapted to provide automatic depth compensation for a cutting tool which controls the position of the tool in relation to a workpiece to hold the predetermined depth of a sleeve bore surface.

Abstract: A tool setting device for a machine tool (10) having a numerical control (22) includes a gage unit (24) with a frame (26) adapted to be secured upon a slide (20) of the machine tool. A photodetector, which includes a source (96) and a receiver (98), is mounted upon the frame for generating a first signal indicating the arrival of the tip of a tool (18). A slide (64) mounted upon the frame carries an engagement head (38) adapted to be contacted and displaced by the tool tip. An LVDT (60) is mounted upon the frame in proximity to the engagement head for sensing its axial displacements. A control meter relay (86,88) is operatively connected to the LVDT and generates a second signal after initial displacement of the engagement head and a third signal after displacement of the engagement head to a reference position.

Abstract: A cutting tool is operatively connected with the piston of a tool positioning cylinder so as to move in response to axial movement of the piston. One end of the cylinder is connected with one end of a stroke limiting cylinder to form a closed fluid circuit therebetween. The piston of the stroke limiting cylinder has a predetermined adjustable stroke. A metering system is provided for injecting or extracting incremental fixed volumes of oil to and from the closed fluid circuit to increase or decrease the stroke of the piston in the tool positioning cylinder and thereby vary the depth of cut of the tool.

Abstract: A workpiece such as a steel profile to be perforated at predetermined distances from a longitudinal reference surface thereof is moved past a plurality of perforating tools, such as punching or drill presses, mounted on a main slide and associated with respective sensors carried on an ancillary slide, the two slides being provided with a rack-and-pinion coupling working into a position detector. Each sensor comprises two sensing heads movable, upon selective activation prior to operation of the corresponding tool, transversely to the workpiece path with a slight relative offset; the ancillary slide is displaced until the reference surface is detected by one--but not both--sensing heads whereupon a corrective motion is imparted to the main slide under the control of the position detector.

Abstract: A machine tool including a tool holder supporting a boring tool and receivable in a tool spindle. A device is provided in the tool holder for adjusting the radial position of the boring tool by utilizing rotation of the tool spindle. A contact detecting head with a known predetermined diameter is secured to the tool holder in co-axial relationship therewith. A contact detecting device detects the contact between a workpiece bore and the contact detecting head. A bore diameter measuring device measures a diameter of the workpiece bore by causing relative movement between the contact detecting head and the workpiece from a first position to a second position wherein at each of the first and second positions the contact detecting head contacts the workpiece, along a path passing through the center of the workpiece bore. The tool spindle is rotated in response to the measuring device to adjust the radial position of the boring tool.

Abstract: A machine tool is provided with an arrangement for increasing its precision by compensating for deviations in tool positioning caused by factors, such as elastic deformation of the machine structure, which vary in their effect in dependence on the current working state of the machine tool. The arrangement includes a compensator device arranged to physically act upon the machine tool to cancel at least one deviation component, and signal processing means controlling the action of the compensator device in dependence on the current machine working state as sensed by a plurality of transducers. The signal processing means stores data interrelating the machine working state to a corresponding appropriate magnitude of action of the compensator device.

Abstract: An improved control system for facilitating tapping work in a machining center of the type which performs a variety of machining operations automatically. Control is effected by establishing and maintaining a certain relationship between the operation of a spindle motor which rotates a tap, and the operation of a Z-axis feed motor which transports a table longitudinally of the tap, the table mounting a workpiece. Specifically, the spindle motor and Z-axis feed motor are driven in relation to one another at all times in such a manner that the equation N.sub.s =f.sub.m /P will be satisfied, where N.sub.s (rpm) is the rotational speed of the spindle motor, f.sub.m is the feed speed of the table along the Z-axis, and P is the thread pitch of the tap. Apparatus for controlling the spindle motor includes a control circuit which is adapted to stop the spindle at a prescribed angle of rotation.

Abstract: A servicing machine for a steam generator is accurately set up in the generator channel head with a pivoted arm mounted for rotation in a plane parallel to the tubesheet. The angular position of the arm, the longitudinal position of a carriage mounted on the arm and the vertical position of a platform on the carriage are remotely controlled to maneuver a probe used in mapping the precise location of the thousands of holes in the tubesheet. Various operations are then performed at each precise hole location by tools carried by the arm mounted carriage to prepare for installation of new tubing. The operation of a pair of remotely controlled pivoted arms, one on each side of the channel head divider plate, is coordinated to automatically position the ends of U-shaped tubes in corresponding holes in the tubesheet on opposite sides of the divider plate and to secure the same in place.

Abstract: An electronically controlled thread-cutting machine comprising a pulse controlled stepping motor for driving the thread-cutting tool, sensor means for scanning an adjustable thread depth and the torque on the thread-cutting tool, said scanning means comprising a counter for determining the steps of the motor and the number of revolutions of the thread-cutting tool respectively therefrom for determining the depth of the thread, and the current consumption of the motor being used for determining the torque transmitted to the thread-cutting tool, the motor being controlled in accordance with the torque and depth of the thread by micro-processor means for reversing the motor when the torque exceeds an upper limit torque and when the desired and preselected thread depth has been attained.

Abstract: The present disclosure teaches a process and related apparatus for longitudinal adjustment of tools for individual working spindles of a multiple-spindle automatically controlled machine tool. The tools introduced into the working spindles in the direction of their lengths to be adjusted are run in rapid advance in all cases against a measuring device which, on reaching a predetermined distance from the working part reference point, produces a first signal in which the rapid advances of the working spindles are switched off individually. The first signal from the measuring device finally reached by the tool involved switches on crawling speeds for all working spindles. The spindles are switched off individually on reaching the working-part reference points in all cases by a second signal from the measuring devices.

Abstract: A boring tool comprising a tool head provided with a slot extending transverse to the axis of the tool head in which a pair of opposite cutting knives are guided movable in longitudinal direction of the slot. A spacer is guided in the tool head movable between a first and a second position. In the first position the spacer is located between inner ends of the cutting knives which are spring biased to engage the spacer to be movable with the latter in the longitudinal direction of the slot while holding the cutting knives in a cutting position. In the second position the spacer frees the cutting knives to move under the influence of the biasing springs toward each other to an inactive position.

Abstract: The present method relates to finish boring of prebored bores in a work piece such that an operative fit with a counterpart or further work piece is achieved. The finishing of the bore may be accomplished independently of the instantaneous temperature of the work piece and of the counterpart by operating a tool carriage, for example, on a lathe, with a stepping motor controlled by a correction value computer which generates a control signal in response to a temperature difference between the work piece temperature and a reference temperature. The reference temperature may be that of the further work piece.

Abstract: A fixed station at a numerically controlled machine includes gauging means and automatic adjusting means for an adjustable cutting tool installed in the spindle of the numerically controlled machine. Multiple tools stored in the magazine of the NC machine for different cutting operations are provided with a common reference dimension to a cutting point so that the same gauge heads which include differential transducers registering respectively with the cutting point and reference surface of the tool can be employed to effect gauging and adjustment of different cutting tools.

Abstract: A contact detecting apparatus for detecting the contact of a workpiece with a tool in a machine tool which comprises a coil mounted on the periphery of a spindle head and connected to an AC power source for generating an induced current in a looped secondary circuit including the workpiece, a work table, a machine body, a spindle head, a tool spindle and the tool, when the workpiece and the tool are moved relatively into contact with each other. Bypassing elements are included in the secondary circuit for bypassing an electric resistance in spindle bearings. A detector is connected between the AC power source and the coil for detecting a change in an electric signal caused by the contact between the workpiece and the tool.

Abstract: A hydraulic drill unit for drilling multimaterial, thick layer stock having a conventional hydraulic drill modified to have its feed controlled by a servo valve and its spindle speed controlled by a servo valve. A linear encoder is attached to the drill to provide an indication of drill position. The linear encoded provides 20,000 forward and reverse pulses per inch, depending upon the direction of travel, which are used to determine net feed rate. The net feed rate signal is compared with a command feed rate to control the feed servo valve. A magnetic pickup is used to provide a pulse signal proportional to RPM. This signal is compared with a command speed signal to control the spindle speed servo valve. Differential pressure transducers are used to measure pressure across the hydraulic feed pistion and the hydraulic drill motor to provide signals which can be used as indications of chip packing or a dull drill.

Abstract: A circuit and process for eliminating unbalances on a rotor which permits equalization of unbalance only in constructionally predetermined equalization planes and component angles in which conventionally produced balance signals indicating the amounts and angles of unbalance are rectified and applied to an arithmetic circuit which produces output signals indicating the amounts of unbalance in equalization planes and, where balance in a given equalization plane is not possible, the amount of unbalance in a substitute plane. To permit balancing of different type workpieces having different dimensions, potentiometers are connected to the arithmetic circuit and to a longitudinal positioning circuit for applying signals indicating locations of the planes.

Abstract: Punch presses are positioned for punching holes at selected vertical locations in the flanges of I-beams, angle irons and channels by apparatus which utilizes a movable probe to determine the initial position of the presses and which further utilizes a reversible counter and a comparator to stop the presses after they have moved a selected distance from their initial position.

Abstract: A control system for adjusting the cutter of a boring machine or the like to compensate for cutter wear and other cutting dimensional changes such as those due to temperature variations which is specially adapted for use with a gage for measuring a dimension of a part machined by the tool and which is responsive to a signal from the gage indicating the magnitude and the sense of the variation of the dimension of the machined part relative to a nominal dimension for adjusting the tool the entire amount needed to compensate for the variation in a single adjusting operation.

Abstract: Method and apparatus for accurately positioning a blank angular position transducer element for boring at its center. A relatively high frequency carrier signal is applied to the blank transducer element to be bored and is thereby induced in a master rotor element which is rotated at a constant speed in an operative relationship with the blank. The rotor is made deliberately eccentric with respect to its axis of rotation, and the induced signal contains a carrier signal, a component indicative of relative angular position, and a once-per-revolution eccentricity error component, if the blank element is also eccentric with respect to the axis of rotation. Error detection circuitry isolates the once-per-revolution eccentricity error component, and resolution circuitry resolves it into x and y directions for application to error display devices, or to actuators connected to move the blank transducer element automatically until the x and y components are both zero.

Abstract: An apparatus for compensating for deviations in the straightness of the bed of a machine tool including a wire means providing the reference of straightness. In one embodiment, a wire means is tautly mounted along the bed and submerged in oil to help prevent vibration of the wire means to increase the accuracy of the machine tool. A sensor is mounted to the carriage of the lathe and senses the position of the wire in the oil bath and signals a motor means to adjust the position of the machine tool according to deviations in the straightness of the bed.