forming machine Manufacturing Technology mold
1 Introduction
With the global economy, the new technological revolution will continue to make new progress and breakthroughs in technology to promote rapid development of the world has become an important factor in economic growth. The continuous development of market economy, more and more industrial products to the multi-species, low-volume, high-quality, low-cost development, in order to maintain and enhance this product in the market competitiveness, product development cycles, increasing production cycle short, therefore a variety of products for the manufacture of key technology and equipment - more and more demanding requirements of molds.
On the one hand, enterprises in pursuit of economies of scale, making molds toward high-speed, precision, long-life direction; on the other hand, in order to meet the multi-species enterprises, small-volume, product upgrade quickly gain market needs, the requirements towards the manufacturing cycle Die short, the cost of low the direction of rapid economic development. Computers, lasers, electronics, new materials, development of new technologies, making rapid tooling technology have redoubled the strength of the economy, expanding the scope of application, the type of growing economic and social benefits created by more and more significant.
2 rapid economic modeling technology type
Rapid economic modeling techniques and compared to traditional machining, tooling with short cycle, low cost, accuracy and life expectancy can use to meet production requirements, is a comprehensive cost-effective comparison of a class of significant mold manufacturing technology, summed up There are several categories.
2.1 Rapid Prototyping Manufacturing Technology
Referred to as rapid prototyping manufacturing technology RPM, is the late 80's developed a new manufacturing technology. The United States, Japan, the United Kingdom, Israel, Germany, China launched its own commercial products, and gradually formed a new industry.
RPM is a computer, laser, optical scanning, advanced CAD, computer-aided machining (CAM), numerical control (CNC) integrated high-tech applications. In forming the concept of a discrete plane, piled up as the guide, in the control computer and numerical control based on maximum flexibility for the overall objective. It abandoned the traditional machining methods, changes in the manufacturing sector is a major breakthrough in the use of RPM technology can be directly or indirectly, rapid tooling, the technology has been the automotive, aerospace, appliance, marine, medical, mold and other industries a wide range Following the commercialization of what is now typical of the rapid prototyping technology.
2.1.1 Laser stereo lithography (SLA)
SLA technology is the delivery of computer modeling CAD system for three-dimensional model of products, through computer control laser, according to the trajectory to determine the liquid photosensitive resin layer-by-layer scanning, the scanned area so that curing layers, fused to form the final three-dimensional entity, and then after the final hardening of the lighting after the Department, such as the volume of parts or mold formation.
Three-dimensional laser lithography is forming the main features of any complex shape, forming high-precision simulation of strong, high material utilization, performance, reliability, high cost performance. Suitable for assessment of product appearance, functional experiments, the rapid manufacture of electrodes and a variety of rapid economic mold. However, the technology used in the equipment and the high cost of photosensitive resin to a higher cost.
2.1.2 Contour Laminated Manufacturing Technology (LOM)
LOM technology is three-dimensional computer model, the use of selective laser slicing their hierarchical, cross-section on each floor will be the outline of the bonding layers, and ultimately stacking products into three-dimensional entities.
Forming process is characterized by its fast and inexpensive prototyping materials, low cost, since there is no phase change, There is no thermal stress, shrinkage, expansion, warping, etc., so do the shape-inch accuracy and stability, but after forming block stripping waste more cumbersome, in particular, the complexity of the internal pieces of waste stripping. The process applies to aviation, automobiles, and in the production of larger parts.