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长制品的挤压效率,在很大程度上取决于压机工作行程内的挤压坯料的体积。坯料体积越大,压机产量越高。坯料体积首先取决于挤压杆的强度。挤压杆前部圆柱部分的平均压应力σ_H不能小于挤压筒的工作压力。挤压杆的这一部分长度决定坯料的体积。随着钢的热挤压工艺的发展,挤压杆强度成了一个关键的问题。前部圆柱部分长度与直径的比ε_1=L_1/d=5～6的挤压杆,已成功
The extrusion efficiency of long products depends largely on the volume of extruded stock within the working stroke of the press. The larger the billet volume, the higher the press yield. The billet volume first depends on the strength of the extruded rod. The mean compressive stress σ_H of the front cylindrical portion of the squeeze rod can not be less than the working pressure of the squeeze tube. The length of this part of the pinch rod determines the size of the blank. With the development of the hot extrusion process of steel, the strength of the extruded rod has become a key issue. The length of the front part of the cylinder diameter to diameter ratio ε_1 = L_1 / d = 5 ~ 6 squeeze lever, has been successful