tailieunhanh - Manufacturing Design, Production, Automation, and Integration Part 9

Tham khảo tài liệu 'manufacturing design, production, automation, and integration part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 9 Modern Manufacturing Techniques In Chaps. 6 to 8 of this book several primary manufacturing processes were presented for the fabrication of metal plastic and ceramic parts. The casting molding powder processing metal forming and conventional machining techniques described in these chapters dominated the manufacturing industry until the mid-1900s. Their total dominance however has been reduced with the introduction of numerous new commercial non-traditional manufacturing techniques since the 1950s ranging from ultrasonic machining of metal dies to the nanoscale fabrication of optoelectronic components using a variety of lasers. The first such processes were developed in response to the common drawbacks of traditional material removal techniques discussed in Chap. 8 for faster and more accurate machining of modern engineering materials. These nontraditional machining processes introduced mainly in the late 1940s were originally targeted for the production of complex geometry as well as microdetailed aerospace parts. Today the emphasis remains on reduced scale manufacturing micro and nano level with extensive use of lasers for noncontact toolless fabrication of parts for all industries household automotive aerospace and electronics. Modern manufacturing techniques have often been classified according to the principal type of energy utilized to remove or add material mechanical electrical thermal and chemical. Copyright 2003 by Marcel Dekker Inc. All Rights Reserved. Mechanical processes Ultrasonic machining and abrasive jet machining are the two primary nontraditional mechanical processes. Material is removed through erosion where hard particles in a liquid slurry are forced into contact with the workpiece at very high speeds. Electrochemical processes Electrochemical machining is the primary representative of this group. It uses electrolysis to remove material from a conductive workpiece submerged in an electrolyte bath particles depart from the anodic workpiece .