The first of which is sintering whereby the material is heated without being liquified to create complex high resolution objects. Additive Manufacturing TechnologiesĪM technologies can be broadly divided into three types. This method of additive manufacture is usually performed using robotic welding equipment. This process commonly uses wire as a material source and follows a predetermined path to create the desired shape. Wire arc additive manufacturing uses arc welding power sources and manipulators to build 3D shapes through arc deposition. Wire Arc Additive Manufacturing (Now known as Directed Energy Deposition-Arc (DED-arc)) Mirrors are used to direct ultraviolet light which cures the successive layers of resin through photopolymerisation. This process uses a vat of liquid resin photopolymer to create an object layer by layer. UAM uses ultrasonic welding to join thin metal sheets a low energy, low temperature process, UAM can be used with various metals such as aluminium, stainless steel and titanium. Laminated object manufacturing is suited to creating items with visual or aesthetic appeal and uses alternate layers of paper and adhesive. Sheet lamination can be split into two technologies laminated object manufacturing (LOM) and ultrasonic additive manufacturing (UAM). Electron beams, lasers or thermal print heads are used to melt or partially melt fine layers of material after which excess powder is blasted away. Powder bed fusion encompasses a variety of AM techniques including direct metal laser melting (DMLM), direct metal laser sintering (DMLS), electron beam melting (EBM), selective laser sintering (SLS) and selective heat sintering (SHS). The layers adhere through temperature control or chemical bonding agents. This builds melted material layer by layer as the nozzle moves horizontally and the bed moves vertically. This common AM process uses spooled polymers which are either extruded or drawn through a heated nozzle which is mounted on a movable arm. A laser, electric arc or an electron beam gun mounted on an arm moves horizontally melting wire, filament feedstock or powder to build up material as a bed moves vertically. This technique uses a 3d printing style head moving on x, y and z axes to deposit alternating layers of powdered material and a liquid binder as an adhesive.ĭirect energy deposition additive manufacturing can be used with a wide variety of materials including ceramics, metals and polymers. There are number of distinct AM processes with their own standards, which include: 1. These are built layer by layer, as with a 3D printing process, which is in contrast to traditional manufacturing that often requires machining or other techniques to remove surplus material. Using computer aided design (CAD) or 3D object scanners, additive manufacturing allows for the creation of objects with precise geometric shapes. National Structural Integrity Research Centre.Structural Integrity Research Foundation.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |