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前言有色金属的挤压加工,是利用压力迫使金属坯料穿过模孔以生产管材、棒材、型材及线材的压力加工方法。挤压加工与轧制法相比,它具有只需简单的更换模具就可以加工各种复杂形状的实心与空心型材,各种厚、薄壁管材的特点。特别适合于小批量、多品种生产。而且制品性能和经济效果好。目前,挤压工艺已成为有色金属管、棒、型材的主要加工方法。西欧各国一般都采用挤压法生产。美国虽然还用轧制法,但挤压棒型材产量急剧增加。表1即为美国1954——1970年铅轧制与挤压棒型材的产量统计。从统计数可以看出,1970年美国挤压棒型材的产量是轧制棒型型材产量的12倍。
Preface Non-ferrous metal extrusion processing, is the use of pressure to force the metal blank through the die hole to produce pipe, bar, profile and wire pressure processing methods. Compared with the rolling method of extrusion, it has the ability to process solid and hollow profiles of various complex shapes with a simple change of mold, and features of various thick and thin-walled tubes. Particularly suitable for small quantities, more varieties of production. And product performance and economic effect. At present, the extrusion process has become a non-ferrous metal pipe, rods, profiles of the main processing methods. Western European countries generally use the extrusion method of production. Although the United States also use the rolling method, but the extrusion rod profile output increased dramatically. Table 1 is the United States 1954 - 1970 lead rolling and extrusion rod profiles production statistics. Statistics from the statistics shows that in the United States in the year 1970, extruded rod profiles produced 12 times the output of rolled rod profiles.