Abstract: A gripper mechanism for feeding a pair of elongate strips such as a pair of slide fastener stringers has a pair of gripper holders supporting a pair of grippers for gripping the slide fastener stringers, respectively, and a pair of sliders joined to the gripper holders, respectively, and slidably disposed in a housing for independent movement therein. In response to engagement with a cam on a feed path, the grippers are opened to grip or release the slide fastener stringers. The grippers are normally urged by a spring to clamp the slide fastener stringers. A pinion is angularly movably supported on a slide block in the housing and held in mesh with a pair of racks, respectively, of the sliders. A spring acts between the housing and the slide block for normally urging the slide block in a direction to move the gripper holders into abutment against the housing. The gripper holders can be moved relatively to each other toward and away from the housing.
Abstract: A bar stock feeder for an automatic lathe, comprises a cover tube provided adjacent a rear side of a spindle of the automatic lathe, and a rod guide tube is provided in the cover tube. A push rod is slidably mounted in the rod guide tube in order to feed a bar stock to the lathe. The push rod is moved by a chain driven by sprocket wheels. Lubricating oil is supplied to the rod guide tube for preventing the vibration of the bar stock during the machining operation.
Abstract: In order to increase the product of the speed of rotation times the diameter of the bar stock, the inventive feed apparatus comprises, for guiding the bar stock, a plurality of bearing units constituting the non-rotary part of a hydrostatic bearing receiving oil under pressure. For introducing a fresh piece of bar stock, two rotary components of the bearing unit are capable of opening. A central passage may be either entirely closed and locked, a lever then being completely pushed back, or set ajar, for each bearing unit in sequence, so as to allow the carrier of a pusher to pass, or wide open to allow the fresh bar stock to enter, the mentioned lever then being completely pulled. The feed apparatus is particularly suitable for a computerized numerical control (CNC) automatic lathe.
March 15, 1985
Date of Patent:
December 16, 1986
Societe de Vente et de Fabrication pour le Decolletage Lns SA
Abstract: The box-like elongate main housing or body for automatic bar loaders/feeders comprises a lower portion carried on a bed and an openable upper portion. Each portion is comprised of an inner half-jacket, an outer half-case, and an intervening blanket of a sound-deadening and cushioning material. The two portions are arranged for sealed closure to enclose in the cavity defined between the half-jackets thereof a longitudinal bar guide, the cavity being connectable to a filling and oil lubricating system.
May 21, 1984
Date of Patent:
November 25, 1986
I.E.M.C.A. S.p.A. Industria Elettromeccanica Complessi Automatici
Abstract: A bar puller for use for example on chuck type bar stock machines which includes in combination a mounting member for normal attachment to the turret of the machine. First and second jaw members are pivotally mounted to the mounting member for movement between first and second positions and each jaw member has a facing stock engaging surface to engage a piece of bar stock. Spring means constantly urge the jaws toward the first position so as to grip a piece of bar stock when the bar stock is held by the engaging surface.
Abstract: A control device for feeding metal bars to guide equipment for feeding an automatic multiple-spindle lathe. The device consists of a series of drive shafts, each of which accounts for the feeding of a bar. The shafts are equal in number to the lathe spindles and are placed in a drum that rotates synchronously with the lathe spindle holding drum. Each of these shafts can be coupled with a drive element when a certain length of bar is to be fed. The coupling takes place through engaging and disengaging parts mounted between the shaft and the drive element. Each shaft controls at least one gear for feeding a bar, through a chain or the like provided with a bar-pusher, when the shaft is made to turn. The gear can be moved to make the device usable with lathes having different spindle center distances.
Abstract: A bar puller adapted for mounting on a machine tool, such as a turret lathe, for engaging and pullingly advancing a workpiece bar. The bar puller has a compact cup-shaped housing provided with a stub shaft which mounts in the turret. The cup-shaped housing has a bore opening outwardly through the free end thereof, and an elastomeric grippping sleeve unit is closely fitted and seated within the bore, which sleeve unit projects axially beyond the free end of the housing. A nut threadably engages the housing and has an abutment wall which radially overlaps and axially engages the exposed axial end of the gripping sleeve. Rotation of the nut relative to the housing causes axial compression of the sleeve unit, whereby the latter elastically deforms radially inwardly so as to grippingly engage the workpiece bar as inserted into the central opening thereof.
Abstract: A bar puller for a machine tool, such as a lathe. The puller is provided with a body which mounts on the tool support so that the puller can be advanced radially toward the bar and also moved axially therealong to effect pulling. The body for the puller mounts a pair of rockers which project forwardly to effectively straddle the bar. These rockers mount rollers on the free ends thereof, the latter being provided with elastomeric surfaces to effect gripping of the bar. The body preferably has an adjustable guide pin which is moved to abut the side of the bar, thereby providing a three-point support. Springs urge the rockers inwardly toward one another so that the rollers grippingly engage the bar therebetween. When so engaged, the tool support is moved axially of the machine to effect the desired pulling of the bar.
Abstract: A bar puller mounted at a tool station on the turret of a numerically controlled turret lathe has opposing reversible, self-centering jaws biased toward each other and to a centered position for general alignment with the projecting end portion of a bar held by a rotary chuck mechanism, which comprises part of the lathe. The jaws receive and grip the projecting end portion of the bar therebetween when the bar puller is forced into engagement with the projecting end of the bar by movement of the turret. The bar puller may be adapted for mounting at either a boring or turning tool station on the turret. The jaws are adjustably positionable to receive and grip bars of differing size.
Abstract: A machine for forming a smooth surface on a cylindrical log workpiece as it is moved longitudinally past a cutting station which includes both shaping and planing blades. The same cutting pass also includes a cove cutting operation to cut a longitudinal cove cut on the surface of the log workpiece and a plurality of transverse saddle cuts across the log workpiece.
Abstract: A workpiece feed device for lathes wherein an elongated workpiece is supported solely at the opposed end areas thereof. The workpiece extends through the lathe spindle feed opening with one end being clampingly engaged thereat and the other end being supported by a workpiece pusher. This pusher is selectively movable by drive means linearly along a workpath so as to sequentially feed the workpiece into the lathe. The pusher is supported by a plurality of roller sets so that it may freely rotate coaxially about the workpath and the roller sets are positioned in a generally surrounding relationship with the pusher so that any lateral pusher movement relative to the workpath is substantially limited or eliminated. Also, the roller sets and pusher are dimensioned to cooperate with each other at some predetermined radial distance from the workpath so that the workpiece is supported over its length solely at the opposite end areas thereof.
Abstract: A bar stock puller for advancing bar stock in a machine tool including a tool body having a shank engageable by a tool holder and a jaw support portion pivotally mounting a pair of jaw assemblies that define spaced, opposed jaws adjustably mounted to a pair of jaw holders. The replaceable jaws define V-shaped, confronting gripping surfaces for engaging the circumference of substantially round bar stock and are biased towards each other in a clamping direction by a spring biasing force applied to the jaw holders by a plunger and an adjustable spring located within the shank. The jaw holders also define recesses which together define a gauge receiving opening by which the bar puller can be preset for a particular bar stock size at a location remote from the machine tool.
Abstract: Apparatus for feeding bar stock through the chuck of an automatic lathe. The apparatus is moved laterally by the turret to form shallow notches in the surface of the bar stock. The notches in the bar stock are gripped during longitudinal movement of the turret to advance the bar stock into the work area. A pair of cutting elements are adjustably located on one end of the apparatus to grip bar stock of various diameters. Guide blocks having interchangeable bushings to accommodate bar stock of different diameters are also disclosed for supporting the bar stock for rotation by the chuck.
March 26, 1981
Date of Patent:
September 20, 1983
Vernon F. Blanchard, Bradley V. Blanchard
Abstract: Feeder for automatic lathe, with a tube wherein the material to be machined is held by a plunger cum piston which can be moved hydraulically within the tube. The invention provides a hydraulical system connectable to the rear opening of the tube for exerting on the piston of the plunger a force directed towards the cutting tools, and also a cable or like flexible member, fixed to the rear of the plunger cum piston, which cable serves both to determine the exact position of the plunger and to pull it backwards for extracting the remaining stub when the bar has been fully machined. The cable is maintained under tension.
Abstract: Wires are picked from a loose bundle of wires which have been cut to length, prior to feeding to a processing machine such as a grid welding machine. The bundle is laid on a supporting table (23) so that end parts of the wires project freely beyond the table. A lifting beam (18) having a vertical slot (19) is then raised beneath the projecting end parts of the wires so that most of the wires are raised but the others are received one above the other in the slot. A gripper having clamping cheeks (20) is applied from below and grips the lowermost wire in the slot. The gripper is mounted on a carrier (2) which is movable parallel to the wire axes to pull the gripped wire longitudinally out of the slot.
December 7, 1978
Date of Patent:
February 10, 1981
EvG Entwicklungs-u. verwertungs-GmbH
Hans Gott, Josef Ritter, Klaus Ritter, Gerhard Ritter, Gerhard Schmidt
Abstract: Device for feeding tubes into a tube-insertion machine for heat exchangers such as steam condensers, especially, includes vertically disposed flexible belt means formed with respective holders for the tubes, the flexible belt means and the holders connecting the tubes to one another in mutually parallel disposition.
Abstract: A stock-feeding apparatus is provided for conveying rod stock to a processing machine and includes a guide tube pivotally mounted on two spaced-apart supports, with the guide tube being movable between a loading position and a feeding position. Mounted within the guide tube is a fluid-activated first piston having a holder at one end for holding the end of the rod stock. Mounted within the first piston is a second piston which includes a piston rod for pushing the rod stock into the processing machine. In addition, a revolving guide element is mounted in the guide tube between the second piston and the processing machine to limit buckling of the rod stock to be processed.
Abstract: An adjustable feed mechanism is disclosed to feed elongated stock to a machine, for example, elongated bar stock to a machine tool, so that successive parts may be machined in the machine tool, cut off, and then a new length of bar stock of the proper length fed to the machine tool for the next cycle of operation. The adjustable feed mechanism includes a stock pusher to push the bar stock to the spindle of the machine tool and an actuator means is provided, such as a spring urging the stock pusher forwardly as controlled by a stock feed cam and cam follower. A cable pulley is journaled on an arm moved by the cam follower to have a constant length stroke. A flexible cable is connected to actuate the stock pusher and encompasses part of the cable pulley and then has a variable anchor on an involute curve as a fixed anchor point on the frame of the machine.