Abstract:
A multi-axis electric spraying robot adapted for use in a hazardous environment includes a base having a first pressurized compartment and an arm assembly having a second pressurized compartment in which compartments electric motors are respectively located. The arm assembly is supported for movement on the base at one end thereof. The arm assembly includes a wrist adapted for connecting the opposite end of the arm assembly with a spraying tool. One electric motor is provided to drive each axis. The compartments are pressurized to prevent flammable gases or vapors from entering the first and second compartments during operation of the robot.
Abstract:
A robot-laser system having a minimum number of mirrors for reflecting a laser beam from a fixed laser beam source to a desired location wherein the mirrors are mounted within the hollow, servo-controlled parts of the robot to move therewith. Only a single mirror is mounted within is associated controlled part to reflect the laser beam as it travels between adjacent controlled parts. The robot has a number of degrees of freedom constituted by two orthogonally related linear movements along intersecting longitudinal axes and two orthogonally related rotary joints having intersecting pivotal axes. Preferably, two of the mirrors are mounted so that the laser beam strikes and is reflected from both points of axes intersection within two of the controlled parts. In one of disclosed embodiments a mirror mounted in the base of the robot reflects the laser beam from the source to the other mirrors.
Abstract:
A method and system for transfer of fluids, such as paint, using a fluid canister carried by a transfer device, such as a robot, instead of having paint lines connected to a delivery device, such as a spray gun, carried by the robot. A novel mechanism for initially docking and then filling the canister from a fluid outlet of a pressurized source of fluid without straining the robot is provided. Also, a novel mechanism for cleaning the canister between canister fillings is provided so that paint colors can be changed without loss of productive robot time. In one embodiment, the canister is integrated with the robot. Also, a novel, non-contact sensor is provided for providing a signal to allow the metering of the paint entering or/and discharged from the canister.
Abstract:
Method and system are provided wherein a process robot moves the door of a vehicle to an open position, performs a robotically controlled process within the vehicle and then moves the door back to a closed position. A separate, two-axis programmable arm holds the door in the open position. In particular, the process robot has attached thereto a tool extension whereby the process robot goes in through a window opening of the door of the vehicle, executes a door open path where the door contacts the inner panel of the door and opens the door over a magnetic holder positioned on the two-axis programmable arm below the bottom of the door. The magnet is of sufficient magnetic strength to accurately hold the door at the programmed holding position of the two-axis arm. The process robot then performs a production operation (i.e. painting, priming, sealing, etc.) within the vehicle. The process robot then inserts the tool extension into the window slot of the door and closes the door without touching the processed surfaces of the vehicle.
Abstract:
A method and system for transfer of fluids, such as paint, using a fluid canister carried by a transfer device, such as a robot, instead of having paint lines connected to a delivery device, such as a spray gun, carried by the robot. A novel mechanism for initially docking and then filling the canister from a fluid outlet of a pressurized source of fluid without straining the robot is provided. Also, a novel mechanism for cleaning the canister between canister fillings is provided so that paint colors can be changed without loss of productive robot time. In one embodiment, the canister is integrated with the robot. Also, a novel, non-contact sensor is provided for providing a signal to allow the metering of the paint entering or/and discharged from the canister.
Abstract:
Method and system are provided for cleaning a paint supply line and changing paint colors by inserting and propelling a termination piston or slug having an outer diameter which forms a sliding fit within the supply line to wipe paint off the interior walls of the supply line. Preferably, the supply line is elastic and the termination piston squeegees the paint off the interior walls. In order to more fully clean the supply line prior to changing paint colors, a predetermined amount of cleaning fluid such as a solvent is injected into the supply line behind the termination piston from a common passage of a manifold. A leading piston or slug is then inserted immediately ahead of a new paint color in the supply line. The pistons may be disposable or may be reused by recirculating them by means of shuttle assemblies and a return line. The manifold is fitted with various valves to selectively supply pressurized air, solvent and two or more paint colors to the supply line. The shuttle assemblies are also fitted with valves to shuttle the pistons between the supply and return lines. A process controller controls the timing of the valves of the manifold and the shuttle assemblies. The method and system can also be used to retrofit existing color changers in an economical yet environmentally sound fashion.
Abstract:
A robot-laser system having at least one mirror under active program control for reflecting a laser beam from a fixed laser beam source to a desired location. Preferably, first and second mirrors are mounted on an outer arm of the robot to move therewith and rotate relative thereto. A third mirror reflects the laser beam to the first and second mirrors. A programmable servo system automatically moves each of the mirrors relative to and in synchronization with movement of the moving parts of the robot. Each of the mirror is mounted for rotation about a pair of intersecting axes so that the laser beam strikes the point of intersection. In one of the disclosed embodiments a fourth mirror reflects the laser beam from the source to the other mirrors.
Abstract:
An apparatus and a method for compliant positioning of an object during an assembly operation wherein the apparatus includes a base plate, a locator plate for mounting an object such as a clamp or a tool spaced from the base plate and a plurality of linear actuators connected between the base plate the locator plate by universal joints providing six degrees of freedom of movement. According to the apparatus and the method a control is connected to the actuators for selectively moving the locator plate to a predetermined position relative to the base plate for contacting a component to be assembled with an object mounted on the locator plate. Two or more of the actuators can be mechanically coupled to move the locator plate with less than six degrees of freedom. The control is responsive to a force applied to the locator plate through the object during assembly of the component for actuating the linear actuators to change the applied force.
Abstract:
Methods and apparatus for controlling a remote device using a command glove system are disclosed. An apparatus for controlling a device is arranged to be at least partially supported on and operated by a human appendage. The apparatus is further arranged to transmit signals to and receive signals from the device, and includes a positioning assembly mounted on the human appendage. The positioning assembly is arranged to respond to motions of the human appendage, and also transmits position signals that are used to control the device. The apparatus includes a braking assembly which is arranged to resist motion of the positioning assembly, and responds to resistance signals received from the device. The apparatus also includes a sense effecting assembly which transforms haptic signals received from the device into sensations felt by the human appendage.
Abstract:
An overload release apparatus for a robot supports a cutting tool such as an abrasive grinding wheel. A force sensor detects an amount of force applied to the cutting tool by a workpiece while a force release mechanism reduces the force applied to the cutting tool. The force release mechanism includes an electromagnet secured within a housing, a follower disposed within the housing which is allowed to move both linearly and angularly, and an elastic element interposed between an upper wall of the housing and the follower. During normal operation, the follower maintains contact with and is supported by a shoulder formed on an inner circumferential wall of the housing by an attractive force of an electromagnet. When a cutting tool, such as an abrasive cutting wheel, engages with an irregularity on a workpiece, an axial force and a moment are applied to the follower causing the follower to move both linearly and angularly inside the housing. The follower and the housing maintain contact through engagement between a toroidal shaped circular protrusion, formed on the follower, and a cylindrical surface disposed about a hole in the housing. Vibrations transmitted from the cutting tool to the follower are received by an elastic vibration damping medium which is interposed between the follower and the housing to thereby absorb high frequency vibrations.