Trumpf Maschinen Ag

Trumpf Gmbh & Company

Trumpf America, Inc.

Firma Trumph Maschinene Ag

Trumpf Grusch Ag

Eugen Herb

Berthold Leibinger

Hubert Bitzel

Erich Brekle

Theodor Petera

Hans Klingel

A machine tool employs a workpiece guidance system comprising a pair of guide assemblies each including a stop member movable along one of the X and Y axes and a clamping element for clamping the workpiece in the stop member for movement therewith. The clamping element is movable independently of its associated stop member as well as therewith, and one stop member will provide a guide surface for the workpiece as it is moved past it by the other guide assembly. In one embodiment, the clamping element is a claw or clamp in a fixed position on the stop member and which is automatically actuable to clamp the workpiece or to release the workpiece for guided movement thereby. In another, the clamp is slidably supported in the stop member for movement relative to a base element to provide clamped guiding movement for the workpiece and also can be locked in a position to fix the workpiece therefor. The machine tool also includes a computer control system for operating the motors which drive the guide assemblies and for operating the hydraulic mechanisms.

Apparatus and method for clamping and positioning workpiece in machine

A rivet has a head and an elongated shank of generally circular cross section extending axially therefrom. The head has a periphery including a multiplicity of spaced portions projecting radially outwardly of the periphery of the shank and at least three guide portions between these projecting portions which provide guide surfaces extending axially of the rivet with their root surface disposed in substantial axial alignment with the periphery of the shank. The head may have a configuration shaped like a dome, or an inverted frustoconical element, or a prism, and the guide portions can be arcuate in transverse section or rectilinear. The rivet shank may have a groove along its length to facilitate securing of the workpieces therewith without requiring upsetting of the shank, and the shank may have a sharp cutting edge at its free end to facilitate penetration of the workpieces to avoid the necessity for predrilling and the like. A rivet guide member is cooperatively configured to provide axially extending guide elements along a channel therethrough, and these orient the rivet guide surfaces thereagainst with the projecting portions of the rivet head extending into the spaces therebetween.

Rivet

A machine tool employs a workpiece guidance system comprising a pair of guide assemblies each including a first stop member movable along one of the X and Y axes and a clamping element a second stop member for clamping the workpiece against the first stop member for movement therewith. The second stop member element is movable independently of its associated first stop member as well as therewith, and each stop member will provide a guide surface for the workpiece as it is moved past it by the other guide assembly. The machine tool also includes a computer system control for operating the motors which drive the guide assemblies.

Stop mechanism, particularly for stampling machines

A stamping or nibbling machine for cutting pieces off a metal workpiece comprises a hollow punch adapted to be driven against the workpiece to win small pieces thereof. A die having an opening therethrough is adapted to be located in alignment with the punch and on the other side of the workpiece. A centering pin has one end projecting into the interior of the punch and an opposite end extending out of the punch and adapted to engage into the opening beyond the position of the workpiece and a displacing mechanism for the pin is carried within the hollow punch and is advantageously in the form of a coil spring located between a collar at the inner end of the punch and the inner wall of the hollow workpiece which moves the outer end of the centering pin into association with a centering pin mounted within the die below the opening thereof.

Stamping or nibbling machine

There is disclosed a method and apparatus for the simultaneous machining of a stack of plate-like workpieces wherein the individual workpieces of the stack are initially assembled into a stack which is held in a manner which will not interfere with the subsequent machining operations by use of rivets or the like. The plate-like workpieces are mounted in the stack upon a support plate, and the machining operations are preferably so conducted as to penetrate through the lower most member of the stack and into the upper portion of the support plate. The machine tool is preferably one in which a series of stations for drilling, riveting, machining and then drilling out the rivets is provided. The tool may include means for automatically and precisely moving the stack between the several work stations. The method involves the preliminary assembly of the stack of plate-like workpieces upon the support plate and the initial clamping in that assembly until the elements of the stack are initially drilled and riveted to secure the elements of the stack in position relative to each other for the subsequent machining operations.

Method for simultaneous machining of a stack of plate-like workpieces

A machine tool construction, comprises, a support frame which has a bar portion extending in one direction, for example, a longitudinal direction, with a gear rack defined thereon, and with a carrier guide movable along said bar portion and having a drive motor for its movement with a pinion which is engaged on the rack to effect the motion. A work carrier is similarly mounted in the carrier guide for movement at right angles to the axis of the bar and it is driven by a separate drive motor driving through a pinion and a rack defined on the work carrier. At least one work holder is mounted for slidable movement along the work carrier and it may be locked to the work carrier against movement and transported by movement of the work carrier or it may be released from the work carrier. In addition, a locking device is provided for locking the work carrier in a fixed position and it may be carried either by the frame of the machine itself or by the carrier guide. The locking device includes a locking member which may be forced downwardly into a locking recess defined on each work holder, only when the work holder is located directly below the locking element. When the work holder is locked by the locking device, it may be released from the carrier, and the carrier may be moved to similarly transport another work holder into association with another locking device. Each work carrier includes clamping a clamp for clamping a workpiece.

Machine tool with an adjustable mechanism for fixing and displacing a

There is disclosed a method and apparatus for the simultaneous machining of a stack of plate-like workpieces wherein the individual workpieces of the stack are initially assembled into a stack which is held in a manner which will not interfere with the subsequent machining operations by use of rivets or the like. The plate-like workpieces are mounted in the stack upon a support plate, and the machining operations are preferably so conducted as to penetrate through the lowermost member of the stack and into the upper portion of the support plate. The machine tool is preferably one in which a series of stations for drilling, riveting, machining and then drilling out the rivets is provided. The tool may include means for automatically and precisely moving the stack between the several work stations. The method involves the preliminary assembly of the stack of plate-like workpieces upon the support plate and the initial clamping in that assembly until the elements of the stack are initially drilled and riveted to secure the elements of the stack in position relative to each other for the subsequent machining operations.

Apparatus for simultaneous machining of a stack of plate-like workpieces

A nibbling machine comprises a workpiece support which is driven by separate drive motors in longitudinal and transverse directions to shift the workpiece during the times at which it is not contacted by a punch which is arranged to reciprocate over the workpiece and to contact it and effect the nibbling thereof. A rotary control member is rotated in timed relationship to the means for driving the punch and it is connected to each of the motors for driving the workpiece support in a manner to start and stop these motors when the punch is raised off the workpiece for feeding the workpiece. The rotary member advantageously drives through an eccentric of adjustable magnitude to a fluid piston movable in a cylinder to displace a control fluid selectively to an oil volume dispenser which supplies oil to each of the fluid drive motors for operating the workpiece support in the transverse and longitudinal directions. Variations in the eccentric drive will cause variations in the timing of the drive of the fluid motors. The same control may be effected by an electrical drive system wherein the rotation of the control member causes actuation of an electric signal in proportion to the rotational position and the speed of rotation of the member. The adjustment may be effected by shifting pulse producing elements around on the surface of the control member so that a smaller or larger number of these elements pass a switch control dependent upon their distribution over the surface of the control member and the speed of rotation of the control member.

Nibbling machine having automatically adjustable feed control

A stamping or nibbling machine has upper and lower tool carriers, upper and lower tool magazines arranged respectively above and below the displacement range of a workpiece and rotatable about an axis of rotation which is substantially parallel to the longitudinal axis of movement of a male die in the upper tool carrier, tool carriers in each magazine, and a tool exchanger operable to move a tool from each magazine into a tool carrier and vice versa. All the tools in each magazine, except the tool to be exchanged, are arranged completely above and/or below the displacement range of the workpiece, and the tool to be exchanged is lifted by a lifting device, relative to its magazine, into a transfer plane for movement into the working position in the machine. All the tools in each magazine, except the tool to be exchanged, are covered by a cover plate , and the plates define the boundaries of the displacement plane of the workpiece and prevent engagement of the workpiece with tools in the magazines. At least the lower tool magazine has pivotaly mounted tool holders which extend radially from the axis of rotation of the magazine, and a wedge surface is provided for the tool holders, and forms a lifting device, this wedge surface being arranged at a position associated with the tool carrier of the machine tool.

Machine tool with at least one tool magazine

A stamping or nibbling machine, comprises a workpiece support or means for engaging the workpiece at a spaced location from a punch which reciprocates upwardly and downwardly in respect to a die in order to effect the stamping or nibbling of the workpiece. The support is mounted on a transverse bar which is pivotable about a transverse guide and the guide is carried on a carriage which is pivotable about a longitudinal guide. The workpiece is fed by holding the bar and the carriage against pivotal movement and driving them in the respective longitudinal direction when the punch is lifted off the workpiece. The rate of this feed may be controlled in timed relationship to the movement of the punch so that the feed takes place when the punch is off the workpiece and in a speed of feed which is determined in accordance with the torque acting on the transverse bar and the carriage when they are released for pivotal movement and sensed by associated torque meters. In addition, the feeding control is also carried out in dependence upon the weight of the workpiece as measured, for example, by a measuring bolt at the location of the die. The stamping stroke of the punch can be released through a time-delay device which is controllable by the measuring device for determining the weight of the plate. The torque meters effect a measurement of the center of gravity of the workpiece at any time during its positioning in respect to the punch and the die.

Stamping or nibbling machine having a workpiece feed operable in

A device for shifting a workpiece on a nibbling machine which includes a rotary eccentric shaft which is rotatable to move a nibbling punch into and out of association with a workpiece, comprises a workpiece holder which is driven by a first motor in one direction, and a second motor in a direction transverse to this direction. A switch control is connected to each motor and includes means for imparting a programmed control of the operation of the motors which is varied in accordance with a sensing of the thickness of the workpiece being operated upon so that the movement may be accomplished when the nibbling punch is not in contact with the workpiece. The apparatus includes a control switch in the form of a switch lug which is mounted for rotation with the eccentric shaft of the nibbling punch and which cooperates with a contactless switch member to cause a turning on and off thereof. The control switch lug is advantageously contoured so that it defines an inner switch control surface which defines a control arc of operation which is greater than an outer surface, and means are provided for shifting the responsive switch so that it cooperates selectively with either the inner or outer surface or an intermediate surface in accordance with the thickness of the plate being formed.

Device for automatically shifting a workpiece on a nibbling machine

A copying tracer for tracing templates which have hollows or recesses or bores, particularly for stamping or nibbling machines, comprises a housing with a bore therein with a copying tracer plunger portion slidable in the bore which has a lower end which engages the template. The tracer plunger is biased by biasing means which act to provide a uniform downward biasing pressure on the plunger to engage the lower template engaging end portion of the tracer with the template and which is increased when the template begins to move downwardly, such as when it enters a recess or a groove, so that the movement becomes very rapid. The biasing may be accomplished by a spring system which includes one coil spring acting axially along the axis of the plunger tracer and an additional spring which is locked when the tracer engages the surface of the template but which moves transversely and acts against the plunger in a downward component of force after the tracer is initially moved downwardly. Another embodiment comprises a fluid pressure operated system wherein the plunger is first forced downwardly into engagement with the template by a first pressure source acting on the plunger which is by-passed partially around the plunger, but which acts entirely on the plunger after it is moved initially downwardly.

Growing community of inventors

Ditzingen, Germany

Eugen Herb