Abstract: A compressed air valve circuit actuated assembly for operating a rotary tool turret of a lathe is disclosed which includes an actuator movably disposed in a housing and fixedly connected through an opening to the turret. The actuator moves linearly between a recessed position, wherein a first actuator attached ring of spaced apart teeth is closely intermeshed with a second housing attached ring of identical teeth, and an advanced position wherein the rings are decoupled to permit turret and actuator rotation. A series of compressed coil springs confined between the actuator and housing biases the actuator toward the recessed position. Compressed air supplied from the circuit to a housing chamber moves the actuator to the advanced position in opposition to the springs. A cross-piston, disposed in a bore formed in a housing surface portion and movable between start and ending positions, is coupled by an indexing pin to a slot in the actuator only when the actuator is in the advanced position.

Abstract: There are provided a pair of positioning engaging members (27) which are engageable with or disengageable from each other between a base table (10) and a turret (11), and the turret (11) is prevented from rotating when the positioning engaging members (27) engage with each other. The turning of a ball screw (21) or a nut (25) is changed to a linear motion of the turret (11) by a screw feed mechanism comprising the ball screw (21) and nut (25) for performing engagement and disengagement between the positioning engaging members (27). The screw feed mechanism is driven by a first motor (24), and the turret (11) is indexing by a second motor (32).

Abstract: A CNC automatic lathe has at least one carriage system having an X, a Y, and a Z axis that carries a tool revolver designed as a so-called disk revolver for working with lathe tools and rotary machining tools. In order to reduce as much as possible the distance between a defined cutting plane for the turning process and the carriage system, the Y axis forms with the normal to the cutting plane a relatively small acute angle (beta), so that when the tool revolver is rotated in a controlled manner around its axis, a rotatively driven machining tool mounted on the revolver and located in its working position is swivelled with its axis of rotation through an acute angle out of the cutting plane in the direction of the carriage system. The machining area of the machining tool thus described a movement with a component that extends in the minus direction of the Y axis.

Abstract: In an automatic lathe, a rotatable turret head is supported on a cross slide arrangement for longitudinal and transverse movements with respect to a headstock spindle. At least one counter spindle, associated with the headstock spindle, clamps a workpiece to be severed from the workpiece rod material. The counter spindle and at least one tool holder are arranged on the turret head whereby either the Counter spindle or the tool holder can be moved selectively into alignment with the headstock spindle by the rotation of the turret head. Additional tool holders, disposed spaced and parallel to each other on an additional tool carrier, can be moved selectively into alignment with the counter spindle. At least one turret head tool holder is a multiple tool holder with a plurality of tool clamping devices arranged spaced and parallel to each other. In one turret head position, one tool clamping device is opposite the headstock spindle and the counter spindle is opposite one of the additional tool holders.

Abstract: The NC complex automatic lathe is provided with a main spindle receptive therein a workpiece for chucking the same such as to protrude a front end portion of the workpiece, and a main spindle base for supporting the main spindle rotatably around a center axis and displaceably in a lengthwise direction of the workpiece. A turret type tool slide is disposed in the vicinity of the front end portion of the workpiece. The turret type tool slide is displaced transversely toward the center of the workpiece. A plurality of tool slide members are arranged radially around the front end portion of the workpiece in a free space away from the moving area of the turret type tool slide such as to undergo displacements toward the center of the workpiece.

Abstract: Complex machining such as lathe machining and milling including non-circular machining is effected by a single machine tool effectively and highly accurately.The machine tool comprises a spindle stock having the C-axis control function, a carriage which can be moved and positioned in a direction of the axis of a main spindle, and two tool rests installed on the carriage. Lathe machining and milling are performed by the first tool rest, and non-circular machining is performed by the second tool rest. A tailstock can be also moved in the direction of the main spindle axis, and positioning of the movable members is controlled by an NC device. A force for supporting a workpiece is controlled by a chuck and a tailstock spindle in response to an M function command.

Abstract: The present invention relates to a bar turning lathe comprised of a main spindle (10), a first primary tool-holder turret (12) and a second primary tool-holder turret (16) which both carry tools (13, 17). The second turret (16) carries a transfer spindle (19) arranged to take a part (11) from the main spindle (10) that is already partially machined by the tools of the first (12) and second (16) primary turrets. The body of the second primary turret (16) carries an auxiliary turret (20) axially movable and carrying a tool (21) capable of machining the part (11) carried and rotated by the transfer spindle (19). Such an arrangement allows simultaneous machining of a new part (11) carried by the main spindle (10) and a partially machined part (11) carried by the retaking spindle (19).

Abstract: A CNC (computer numerical control) lathe includes a tailstock feed mechanism consisting of a feed hopper and an air cylinder for feeding a short workpiece, and a secondary tool turret having a feed chuck and a set of rear end cutting tools for processing the end of a bar stock material which has been processed by a main tool turret and a radial processing mechanism for processing a short workpiece delivered through the tailstock feed mechanism.

Abstract: An auxiliary-function hydraulic system is provided for a computerized numerical control (CNC) machine tooling unit. Hydraulic power is provided for locking collet or chuck to an open or closed position and providing an affirmative collet-open and/or collet-closed signal to communicate the collet position to the host computer. The tailstock can be brought gently forward to contact a workpiece and can be returned rapidly to the home position, with a break-away pressure feature being employed to overcome initial static friction. A pressure switch indicates that the tailstock is in position against the workpiece. A spindle brake applies braking to the spindle to stop the same from high speed either on command or in the event of system failure. In the latter case, braking occurs prior to loss of pressure to the collet closer cylinder. Also, a turret clamp locks and unlocks a tool changer turret.

Abstract: The present invention relates to a numerically-controlled lathe, a numerically-controlled device therefore and a procedure for processing a workpiece thereby. An object of the invention is to provide a numerically-controlled lathe adapted to designate one of two spindles and three tool rests and a procedure for processing a workpiece thereby.

Abstract: A CNC lathe comprising two opposed spindle stocks (2a, 2b) and two turret type tool rests (3a, 3b), in which a base (1) is of a slant type, the first spindle stock (2a) is secured to the base (1), the second spindle stock (2b) is provided to be capable of being moved and located only in a direction to the spindle, and both the tool rests (3a, 3b) are arranged in the deep side of the spindle stocks (2a, 2b). The CNC lathe having said construction in which both spindle stocks include an independent spindle motor (21), a spindle indexing and driving device (23) capable of mechanically releasing connection, and encoders (27, 26) on the side of the spindle, and the indexing and driving device wherein an index motor (40) is rotated on the basis of a phase difference detected by the encoder to match a phase when the spindle indexing and driving device (23) is connected to the spindle 11), so when a work (16) is delivered between both the spindles (2a, 2b).

Abstract: A method for compensating thermally induced displacement between a workpiece clamped for machining relative to a tool arranged on a tool holder of an automatically controlled machine tool, such as a lathe, where use is made of mechanical sensors to sense and correct deviations between programmed and actual tool positions relative to the workpiece. With the workpiece clamped in place, a mechanical workpiece sensor clamped in a work holder is adjusted to make mechanical contact with the workpiece in the actual position in which the workpiece is to be machined or has been previously machined. Adjustment to a thermally compensating position of a tool measuring device coupled to a mechanical tool sensor is made via the adjusted mechanical workpiece sensor.

Abstract: A machine for finishing opposite ends of tubular metal stock secures the workpiece in position for machining by means of an expansible collet assembly inserted into the open end of the workpiece and expanded to grip the workpiece while the it is held against a stock stop. Expansion of the collet assembly, machining of the tube end, withdrawal of the machining tools and release of the workpiece from the collet assembly takes place in a controlled sequence.

Abstract: A machine tool having the first and second spindle stocks being relatively movable in Z axis direction in the shape of facing to each other and workpiece spindles provided rotatably through which a workpiece can be held by those spindle stocks.Machining in the first spindle stock is performed on a basis of the machining coordinate system set relating to the first spindle stock according to the first offset value and machining in the second spindle stock is performed on a basis of the machining coordinate system relating to the second spindle stock set by computing on a basis of said first offset value or the second offset value.

Abstract: The machine tool of the invention combines the following three features: the workpiece holder (22) rotates around an axis (C) which is referred to as horizontal turning axis and is parallel to one (X) of the three orthogonal axes (X, Y, Z), the said axis (C) overlying a table (12) the flat upper-face of which is parallel to said turning axis (C) and comprises means for fastening one or more support and/or centering means (15, 24); the toolholder (38) comprises two clamping mandrels, one for a stationary tool and the other for a rotary tool; the workpiece holder is in relation with drive means (23, 25) which confer upon it one of the three kinematics of the following kinematic group: immobilization in a given angular position, a so-called slow speed of rotation for milling operations which are not parallel to the axis (C), and a so-called high speed for the turning.

Abstract: This invention relates to a machine tool having a table for mounting a workpiece. The body of a machine tool is equipped with a table for mounting a workpiece. The table is further equipped with a rotary table. When performing turning operations of the workpiece, the workpiece is mounted on the rotary table. On the other hand, when performing other operations, except for the turning operation, the workpiece is mounted on the non-rotary table. In addition, if desired, the workpiece can be mounted on both the table and the rotary table for performing other operations.

Abstract: Lathe comprising a main work spindle drivable by numerical control and a turret with several indexing stations, the turret having at least one drivable tool spindle, being mounted on a turret slide for rotation about a turret axis and being rotatable by numerical control about this axis by means of a turret driving device, and also comprising a switchable device for securing the turret against rotation. For positive locking of the turret and for play-free mounting of the unlocked turret, spur gears displaceable relative to one another in the direction of the turret axis are connected to the turret and to the turret slide in a rotationally fixed manner, and a bearing is provided for the turret which in the unlocked state of the latter is free from play.

Abstract: A complex machine tool has a single frame having a chip collecting space at a center portion thereof, first and second spindle stocks on the frame, relatively free to move and drive in a Z axis direction and holding the chip collecting space therebetween, workpiece spindles on the spindle stocks free to rotate and drive and facing each other, and tool rests. The tool rests have turrets and can assume various kinds of movement. Complicated and varied types of machining can be performed combining the rotation control of the workpiece spindles and the spindle stocks.

Abstract: A numerically controlled lathe which is capable of effecting combined machining comprises a frame constituting the main body, a main spindle driven to rotate, a main spindle chuck provided on the main spindle to hold a workpiece, a multiple-tool head having a plurality of tools, a turret head and a rear machining head. The multiple-tool head has three servomotors to move it along three axes which are perpendicular to each other. The body of the multiple-tool head has an annular frame structure. At least two rows of rotary and non-rotary tools for machining the workpiece are disposed on the multiple-tool head body in a direction parallel with one of the directions of movement. A tool driving motor is provided on the multiple-tool head body to drive the rotary tools. The rotary tools include a polygon machining tool for machining a polygonal workpiece. The multiple-tool head, the turret head and the rear machining head effect machining simultaneously or successively.

Abstract: An auxiliary-function hydraulic system is provided for a computerized numerical control (CNC) machine tooling unit. Hydraulic power is provided for locking collet or chuck to an open or closed position and providing an affirmative collet-open and/or collet-closed signal to communicate the collet position to the host computer. The tailstock can be brought gently forward to contact a workpiece and can be returned rapidly to the home position, with a break-away pressure feature being employed to overcome initial static friction. A pressure switch indicates that the tailstock is in position against the workpiece. A spindle brake applies braking to the spindle to stop the same from high speed either on command or in the event of system failure. In the latter case, braking occurs prior to loss of pressure to the collet closer cylinder. Also, a turret clamp locks and unlocks a tool changer turret.

Abstract: Automatic turret lathe with a synchronous spindle in the tool turret which is drivable in synchronism with the main spindle and comprises a workpiece chuck means. To enable workpieces to also be worked on the rear side, i.e., on the side on which they were severed from a stock rod, while the next workpiece held in the main spindle is already being machined with the aid of a further tool carrier, a third tool carrier is arranged on the side of the tool turret mounted on a compound slide system facing away from the main spindle.