Abstract:
A method and apparatus for fabricating sheet metal parts using workpiece manipulators to transfer a workpiece from one work station to another and position the workpiece for each operation to be performed. The invention eliminates the need of individual operators and can be managed under microprocessor control using known positions along selected X and Y axes about which programming is performed.A unified design and manufacturing system includes a computer-aided design (CAD) system and a microprocessor-controlled fabrication system consisting of a plurality of manufacturing stations which perform manufacturing and transporting operations upon a workpiece. Design information for a part is entered through the CAD system and includes a reference point. The design information is combined with manufacturing process planning information to produce a part definition data file which is used by the microprocessor-controlled fabrication system to perform machine operations upon a workpiece to produce the part according to the design information. In the microprocessor-controlled fabrication system, the reference point, as entered in the CAD system, is associated with a specific point upon the workpiece. During all times, the manufacturing stations maintain a known orientation between the specified location on the workpiece and axes of the microprocessor-controlled fabrication system.
Abstract:
A robot end effector exchange system comprises a movable robot arm and an end effector. Connecting structure on each of the arm and end effector are operable for releasably attaching the arm and end effector in an operative relationship. A fixture supportably receives the end effector attached to the robot arm and includes restraining structure operable for holding the end effector on the fixture to permit attachment and detachment of the end effector and the arm. Hydraulic actuators on the fixture selectively operate the connecting structure and the restraining structure.
Abstract:
A sealant applicator for applying a thin film donut like ring of sealant in and around the top of a rivet hole prior to the installation of a rivet and immediately after the rivet hole has been drilled. The applicator is characterized by having an air operated probe assembly which is held in a retracted position with the center line of the probe displaced from the center line of the rivet hole while the hole is being drilled. Upon the completion of the drilled hole the probe assembly is immediately moved into alignment with the center line of the hole and lowered onto the work piece and a premeasured amount of sealant is uniformly applied to the top of the hole prior to the assembly being retracted and the rivet installed.
Abstract:
Welding apparatus for making metal honeycomb core panels by welding together preformed corrugated metal strips is disclosed. The assembled portion of the core panel is positioned by vertical finger electrodes on a horizontal base with the core panel workpiece end located along the line of a welding station extending across the base. The finger electrodes are arranged in two rows extending parallel to the welding station line, one row being insertable into the honeycomb core from above and the other being insertable into the core from below, each row also being movable from a first workpiece engaging position to a second welding position with one edge thereof along a welding station line. Welding heads, each including a welding element, are movable to and from the welding station. A corrugated metal strip is detachably held onto and carried to the welding station by the welding heads. The strip is positioned at the welding station with its outer apices and those apices on the workpiece end of the core panel engaging each other at nodes along the welding station line. The welding elements are elongated members having edge faces, the profiles of which register with the strip inner apices when advanced to the welding station. The welding elements are particularly useful with strips formed with tit-like projection arrays on their edge faces. These projection arrays make up the points of engagement between the welding elements and the finger electrodes, across the honeycomb nodes. The welding element longitudinal edge faces force the rearwardly-directed apices of the strip into contact with the forwardly-directed apices of the assembled honeycomb core forming a node so that welding current passes between each welding element and finger electrode through all the projections of one array. A weld joint made up of multiple spot welds, each of which is formed about one projection, is formed simultaneously between each mutually engaging pair of core panel and strip apices. One, two, or more such weld joints may be formed simultaneously, depending upon the number of welding elements. The welding elements thereafter can be retracted, moved parallel to the welding station line, and advanced to form welds at other nodes along the welding station line. When all desired welds are completed along the welding station line, the welding station positioned row of finger electrodes is withdrawn from the honeycomb core, the core advanced by moving the workpiece engaging positioned row of finger electrodes into the welding station position and emplacing the other row into the workpiece engaging position. The welding cycle is then repeated.
Abstract:
An apparatus and a method for bending a workpiece to a predetermined angle in a brake press and automatically compensating for springback of the workpiece which has a sensing device, biased relative the workpiece, for detecting a neutral position of the workpiece corresponding to the cessation of springback motion and generating a signal in response thereto, and a device, responsive to the signal, for measuring the linear distance of springback, and for calculating an amount of overbend required to compensate for springback based on said measured linear distance of springback and the physical geometry of the workpiece. Preferably, the sensing devcie having a linear variable differential transformer having a core rod biased toward the workpiece and in opposition to the punch member of the brakepress.
Abstract:
A magnetic machine tool changer and driver for electro-magnetically holding and driving a cutting tool when working on a work piece. The changer and driver further including a transfer mechanism for removing the cutting tool by electro-magnetic means.
Abstract:
A slip joint tooling fixture for providing unrestricted growth of material used in an airframe structure when heated under high temperatures. The fixture while allowing the unrestricted growth of the material also maintains the overall configuration and integrity of the structure being built. The fixture further provides for minimum restriction of airflow around the outer surface of the structure during the heating up and cooling down process.
Abstract:
The invention is directed to a device and method for profiling and deburring a workpiece. The device includes a profiler having a cutting edge for profiling a workpiece, a deburrer having a cutting edge for deburring profiled edges of a workpiece, and a yoke for supporting the profiler and the deburrer in opposed relation on opposite sides of a planar work position, the yoke being movable along a z-axis perpendicular to the work position to alternately move the cutting edges of the profiler and the deburrer toward and away from a workpiece in the work position. The yoke is also movable so that the cutting edges can be maneuvered in a working plane transverse to the z-axis. The method of the present invention includes the steps of positioning a workpiece in a working plane between a profiler and a deburrer, moving the yoke in a first direction to cause a cutting edge of the profiler to move into the working plane, moving the profiling cutting edge in a first predetermined pattern about at least a first portion of the workpiece, moving a cutting edge of the deburrer device into the working plane, and moving the deburring cutting edge about the first portion of the workpiece in a second predetermined pattern corresponding to the first predetermined pattern.
Abstract:
An apparatus under control of a computer for forming into a three-dimensional shape a generally planar workpiece having a pair of spaced holes therein at predetermined positions, the apparatus comprising a forming tool including a molding surface having a pair of spaced bores therein at predetermined positions and a locating pin disposed in each bore for selective axial movement therein; guide tracks and selectively operable drive mechanisms for moving the tool through an operating circuit including sequential mating, molding and removal stations; a selectively operable transferring mechanism at the mating station for disposing the workpiece on the molding surface of the tool with respective hole and bore positions in registration; a ram at the mating station for selectively projecting one end of each locating pin into a respective hole to restrain the workpiece on the molding surface; a hydropress at the molding station for forming the workpiece to the shape of the molding surface; and selectively operable gripping mechanism at the removal station for removing the shaped workpiece from the tool.
Abstract:
A two arm robot for selectively manipulating a workpiece comprising an elongated cross beam assembly having an elongated axis extending between opposed ends, a frame assembly supported by the cross beam assembly for selective linear movement parallel to Y and Z axes and for selective pivotal movement about the elongated axis, the elongated axis being parallel to the X axis and the X, Y and Z axis being orthogonal, a pair of arm assemblies supported by the cross beam assembly for selective independent linear movement parallel to the X and Y axes, a wrist assembly operatively supported by each arm assembly and including a motor for selectively moving the wrist assembly about a rotation axis parallel to the Z axis, and motor and mounting structure for moving the arm assemblies relative to the cross beam assembly parallel to the X and Y axes.