Laser rapid prototyping (LRP) is a new manufacturing technology that integrates advanced technologies such as CAD, CAM, CNC, lasers, precision servo drives and new materials. Compared with the traditional manufacturing method, it has the prototype of the replication, high interchangeability; manufacturing process and the geometry of the prototype has nothing to do; short processing cycle, low cost, the general manufacturing costs reduced by 50%, the processing cycle is shortened by 70% Above; highly technical integration, to achieve the integration of design and manufacturing.
Recent developments in LPR include: SLA technology; selective laser sintering (SLS) technology; fuse deposition modeling (FDM) technology; laser cladding forming (LCF) technology; laser proximity (LENS) Laser sheet laminate manufacturing (LOM) technology; laser-induced thermal stress forming (LF) technology and three-dimensional printing technology.
The United States, Japan, Germany, Belgium and so have invested a lot of manpower and material resources to study the technology, and continue to have new products come out. Xi'an Jiaotong University, China also successfully developed a three-dimensional light molding machine LPS600a. Currently, more than 10 factories around the world produce the product.
â— Application in automobile body manufacturing SLA technology can produce the required proportion of precision casting mold to cast a certain percentage of body metal model, the use of this metal model can be wind tunnel and collision tests to complete the final evaluation of the body To determine its design is reasonable. US Chrysler SLA technology has been made with the body model, put it in the high-speed wind tunnel for aerodynamic test analysis, and achieved satisfactory results, significant savings in test costs.
â— Used in automobile engine intake pipe test. Intake manifold cavity shape is composed of a very complex free-form surface, which improves the intake efficiency, the combustion process has a very important impact. During the design process, airway tests need to be performed on different inlet pipelines. The traditional method is to manually process tracheal wood or plaster molds, which are described by dozens of cross-sections, and then sand mold the intake pipe for processing , Woodworking's understanding of the drawings and their own technical level often lead to parts and design intent deviation, and sometimes the impact of this error is significant. Although the use of CNC machining to better reflect the design intent, but its preparation time is long, especially when the geometry is more complex. British rover company using rapid prototyping technology to produce the outer tube of the intake manifold and cavity mold, and achieved satisfactory results.
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