Resistance,Welding,and,Frictio technology Resistance Welding and Friction Welding Overview
Active shredder safety technology for the small office. Shreds 15sheets per pass into 5/32" x 1-1/2" cross-cut particles (Security Level3). Patented SafeSense® Technology stops shredding when hands touch thepaper opening. Designated shredde The electronic cigarette is not new. People who buy electronic cigarette knows that this product has been in the market for years now. Despite some sectors apparently trying to shoot the product down from the shelves, the popularity of elect
Resistance or Friction welding are two welding processesthat fit into a category of processes that works with a workpiece that ismoving and another piece that remains stationary. In the process heat isgenerated through friction as the two pieces come together and an"upset" (a lateral force) displaces and fuses these materials. Friction welding is generally used with thermoplastics andother metals and is used a lot in the aviation and automotive industries. Infriction welding there is no melting and the heat is directed to the weldinterface. This creates a small heat zone. Also, as the friction is happeningit cleans the surface of the materials to be welded so the welder does not haveto prepare the surfaces before welding. This method of welding also has several advantages. Themetal that is used has small pieces of "plastic" metal that is forcedout of the area where the friction is happening. This metal called"flash" comes out in ripples and seems to carry away the dirt or thedebris that would normally occur when doing welding. Two different types of metals can also be joined using thismethod. An example of this is in the aerospace industry where they use frictionwelding to bring together aluminum andhigh-strength steel. This can only be done in friction welding because they aretwo different types of metal. The nuclear industry also uses this method to docooper and steel joints that are used in the reactor's cooling systems. When you have metals that are under a lot of pressure andheat you will be working with thermoplastics. You can join metal and plastictogether. A good example of this is when they use friction welding to join thepins of eyeglass frames to the rest of the frame. There are several welding techniques that use frictionwelding. Spin or inertia welding has two "chucks" that hold the metal with one stationary andthe other that rotates. The piece that the welder wants to weld is put on therotating chuck and a flywheel is added so that it will have a specific weight.They then spin the piece they want to weld at a high speed, then remove themotor and the pieces are put under pressure and forced together. The pieces"set" once the spinning has stopped and the pieces have cooled downfrom the friction. Linear friction welding is like spin welding but instead ofspinning it oscillates in a lateral motion. The speed that the welder uses islower and the pieces are kept under pressure throughout the entire process. Inorder to do this type of welding the industry needs a more complex machinewhich is a bit more expensive, but it also allows any two shapes to be joined. Thermoplastics have other methods that they usefor friction welding. In Orbital friction welding an orbital motion is made bythe moving part (similar to the spinning friction process) and it rotates inline with a smaller circle than the joint.
Resistance,Welding,and,Frictio