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用普通丝锥加工东风4型柴油机主轴承螺母M48×2-1时,存在刮削、扩胀等严重质量问题。我们从分析所产生问题的原因,找到了解决问题的途径,设计制造了一种先进的复合式丝锥,成功地攻制出了高质量的螺纹。下面介绍这种刀具的结构特点、工作原理及其经济效果。一、存在问题及其分析东风4型柴油机主轴螺母M48×2-1数量多、精度高,光洁度为▽6,其材料为45调质钢。过去用普通螺母丝锥加工,很准达到设计要求,经常出现刮削或挤压现象,扩胀量大而使中径尺寸超差等,一直是生产的关键。产生这些问题的原因在于:
With ordinary tap processing Dongfeng 4 diesel engine main bearing nut M48 × 2-1, there are scraping, expansion and other serious quality problems. From the analysis of the causes of the problems we have found a way to solve the problem, design and manufacture of an advanced composite tap, successfully developed a high-quality thread. The following describes the structure of this tool features, working principle and its economic effect. First, the existing problems and their analysis Dongfeng 4 diesel engine spindle nut M48 × 2-1 number of high precision, finish ▽ 6, the material is 45 quenched and tempered steel. In the past with ordinary nut tap processing, it is accurate to meet the design requirements, often appear scraping or squeezing phenomenon, the expansion of large diameter size and so on tolerance, has been the key to production. The reason for these problems is: