第一章表明,为了生产铝合金型材,根据型材的外形尺寸和对其所提出的要求,可采用各种不同的挤压工艺方案。本文系研究工业上所采用的某些挤压工艺方法的特点:反挤压;无残料挤压,易挤压合金型材的快速挤压,用组合模挤压空心型材以及变断面型材的挤压。一、反挤压法该方法与正挤压法不同的主要特点是毛坯对挤压筒没有相对移动。因而可大大改变 The first chapter shows that in order to produce aluminum alloy profiles, according to the profile dimensions and the requirements put forward by it, a variety of extrusion process schemes can be adopted. This paper studies the industrial use of some of the characteristics of the extrusion process: anti-extrusion; no residual material extrusion, easy extrusion of the rapid extrusion of alloy profiles, extrusion die with a combination of hollow profile and the deformation of the profile section Pressure First, the anti-extrusion method This method is different from the positive extrusion method is the main feature of the blank on the extrusion cylinder is not relatively mobile. Which can be greatly changed