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1、外文资料robotThe industrial robot is a tool that is used in the manufacturing environment to increase productivity. It can be used to do routine and tedious assembly line jobs， or it can perform jobs that might be hazardous to the human worker . For example ，one of the first industrial robot was used to
2、 replace the nuclear fuel rods in nuclear power plants. A human doing this job might be exposed to harmful amounts of radiation. The industrial robot can also operate on the assembly line， putting together small components， such as placing electronic components on a printed circuit board. Thus， the
3、human worker can be relieved of the routine operation of this tedious task. Robots can also be programmed to defuse bombs，to serve the handicapped， and to perform functions in numerous applications in our society.The robot can be thought of as a machine that will move an end-of-tool ， sensor ，and/or
4、 gripper to a preprogrammed location. When the robot arrives at this location， it will perform some sort of task .This task could be welding， sealing， machine loading ，machine unloading， or a host of assembly jobs. Generally， this work can be accomplished without the involvement of a human being， ex
5、cept for programming and for turning the system on and off.The basic terminology of robotic systems is introduced in the following:1. A robot is a reprogrammable ，multifunctional manipulator designed to move parts，material，tool，or special devices through variable programmed motions for the performan
6、ce of a variety of different task. This basic definition leads to other definitions， presented in the following paragraphs， that give acomplete picture of a robotic system.2. Preprogrammed locations are paths that the robot must follow to accomplish work，At some of these locations，the robot will sto
7、p and perform some operation ， such as assembly of parts， spray painting ，or welding .These preprogrammed locations are stored in the robots memory and are recalled later for continuous operation.Furthermore，these preprogrammed locations， as well as other program data， can be changed later as the wo
8、rk requirements change.Thus，with regard to this programming feature，an industrial robot is very much like a computer ，where data can be stoned and later recalled and edited.3. The manipulator is the arm of the robot .It allows the robot to bend，reach，and twist.This movement is provided by the manipu
9、lators axes，also called the degrees of freedom of the robot .A robot can have from 3 to 16 axes.The term degrees of freedom will always relate to the number of axes found on a robot.4. The tooling and frippers are not part the robotic system itself;rather，they are attachments that fit on the end of
10、the robots arm. These attachments connected to the end of the robots arm allow the robot to lift parts，spot-weld ，paint，arc-weld，drill， deburr，and do a variety of tasks，depending on what is required of the robot.5. The robotic system can control the work cell of the operating robot.The work cell of
11、the robot is the total environment in which the robot must perform its task.Included within this cell may be the controller ，the robot manipulator ，a work table ，safety features，or a conveyor.All the equipment that is required in order for the robot to do its job is included in the work cell .In add
12、ition，signals from outside devices can communicate with the robot to tell the robot when it should parts，pick up parts， or unload parts to a conveyor.The robotic system has three basic components: the manipulator，the controller， and the power source.A.ManipulatorThe manipulator ，which does the physi
13、cal work of the robotic system，consists of two sections:the mechanical section and the attached appendage.The manipulator also has a base to which the appendages are attached.Fig.1 illustrates the connection of the base and the appendage of a robot.IJ* A I .J LlI ：.I I-, -it .-! r:n.1i -i- i ir tii-
14、i图 I.Basic components of a robots manipulatorThe base of the manipulator is usually fixed to the floor of the work area.Sometimes, though, the base may be movable. In this case, the base is attached to either a rail or a track, allowing the manipulator to be moved from one location to anther.As ment
15、ioned previously , the appendage extends from the base of the robot.The appendage is the arm of the robot. It can be either a straight , movable arm or a jointed arm. The jointed arm is also known as an articulated arm.The appendages of the robot manipulator give the manipulator its various axes of
16、motion. These axes are attached to a fixed base , which, in turn, is secured to a mounting. This mounting ensures that the manipulator will in one location.At the end of the arm , a wrist (see Fig 2) is connected. The wrist is made up of additional axes and a wrist flange. The wrist flange allows the robot user to connect different tooling to the wrist for different jobs.Kockinc /I 3 ： I川fuh/llM (IHtlsi tin .A
