23-12-2011, 11:23 AM
i want welding robots details
23-12-2011, 11:23 AM
i want welding robots details
24-12-2011, 09:24 AM
to get information about the tpopic"welding robots"refer the link bellow https://seminarproject.net/Thread-welding-robots https://seminarproject.net/Thread-weldin...ull-report
18-06-2013, 12:50 PM
Welding Robots
![]() INTRODUCTION Welding technology has obtained access virtually to every branch of manufacturing; to name a few bridges, ships, rail road equipments, building constructions, boilers, pressure vessels, pipe lines, automobiles, aircrafts, launch vehicles, and nuclear power plants. Especially in India, welding technology needs constant upgrading, particularly in field of industrial and power generation boilers, high voltage generation equipment and transformers and in nuclear aero-space industry. Computers have already entered the field of welding and the situation today is that the welding engineer who has little or no computer skills will soon be hard-pressed to meet the welding challenges of our technological times. In order for the computer solution to be implemented, educational institutions cannot escape their share of responsibilities. INTRODUCTION TO AUTOMATION AND ROBOTICS Automation and robotics are two closely related technologies. In an industrial context, we can define automation as a technology that is concerned with the use of mechanical, electronics and computer-based systems in the operation and control of production. Examples of this technology include transfer lines, mechanized assembly machines, feed back control systems, numerically controlled machine tools, and robots. Accordingly, robotics is a form of industrial automation. INTRODUCTION TO WELDING Welding is a process of joining different materials. The large bulk of materials that are welded are metals and their alloys although welding is also applied to the joining of other materials such as thermoplastics. Welding joins different metals or alloys with help of a number of processes in which heat is supplied either electrically or by means of a gas torch. SPOT WELDING As he term suggests, spot welding is a process in which two sheet metal parts are fused together at localized points by passing a large electric current using two copper electrodes, hence producing the weld. For relatively small parts a spot welding machine is used in which the parts are inserted between the pair of electrodes that are maintained in a fixed position. Where as for larger works such as in automobile bodies a portable welding gun is used which consists of a pair of electrodes and a frame to open and close the electrodes. WHY CONTINUOUS ROBOTIC ARC WELDING? Arc welding is performed by skilled workers who are assisted by a person called fitter. The purpose of the fitter is to organize the work and fixture the parts of the welder. The working condition of the welder is typically unpleasant and hazardous. The arc from the welding process emits ultra-violet radiations which is injurious to human vision. As a result welders are required to wear eye protection in the form of a welding helmet with a dark window. The dark window filters out the dangerous, but it so dark that the welder is virtually blind while wearing the helmet except when the arc is struck. Other aspects of the process are also hazardous. The high temperature created in arc welding and the resulting molten metals are inherently dangerous. The high electric current used to create the arc is also unsafe. Sparks and smoke are generated during the process are a potential threat to operators. Because of the hazards for human workers in continuous arc welding, it is logical to consider industrial robots for the purpose. PROBLEMS FOR ROBOTS IN ARC WELDING 1. A related problem is that arc welding is often performed in confined areas that are difficult to access, such as insides of tanks, pressure vessels, and ship hulls. Humans can position in to these areas more readily than robots. 2. One of the most difficult technical problems is the variation in the dimensions of the parts in a batch production job. This type of dimensional variations means that the arc-welding path to be followed will change slightly from part to part. 3. Another technical difficulty is the variations in the edges and surfaces to be welded together. Instead of being straight and regular, the edges are typically irregular. This causes variations in the gap between the parts and other problems in the way the pieces mate together prior to the welding process. |
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