一、引言以往的小型榨油机螺旋榨头采用组合结构,由轴芯、多节轴螺及锁母用平键装接而成(图1)。其材质为45~#钢。工序多下料、锻打、退火、切削加工、淬火、回火、磨削,生产周期长,成本高,且使用中榨油麻饼厚达2 mm,出油率不高。若将出麻饼间隙变小,则出现“卡车”现象,不能正常生产(参看图2)。 I. INTRODUCTION In the past, the screw press of small oil press was assembled by a combination of a shaft, a multi-section shaft screw and a lock key (Figure 1). Its material is 45 ~ # steel. Processes and more cutting, forging, annealing, cutting, quenching, tempering, grinding, long production cycle, high cost, and the use of pressing oil cake up to 2 mm, the oil rate is not high. If the cuttlebone gap becomes smaller, there is a “truck” phenomenon that can not be normally produced (see Figure 2).