DK-20连杆精密级锻造工艺的应用

Application of precision forging technics of connecting rod DK-20

通过分析传统工艺锻造连杆的主要质量问题,从改进工艺方案、优化模具设计与制作、控制生产操作过程的标准化作业等方面着手,采用预锻加终锻、热态平面精压两项修整措施对制件的厚度尺寸进行了精确控制;通过控制制坯尺寸来调节产品终锻成型时的变形抗力,利用变形抗力的变化解决了模锻中心、模膛中心、模块中心三心不重合给锻造生产带来的不利影响;采用先进的加热手段,减少氧化的加热方法及合理的工艺、工序设计保障了制件的表面质量;通过对操作过程的标准化作业控制增强了产品质量的稳定性。这一系列的改进较好的解决了用普通蒸汽-空气模锻锤生产锻件时锻件表面质量差、厚度尺寸达不到设计要求、锻件尺寸精度等级低等质量难题。

Connecting rod DK-20 is the key part of diesel engine DK-20. Since its high forging size requirements, traditional connecting rod forging technics cannot meet the quality needs. After the analysis of the main quality problems in traditional rod forging technics, the production of DK-20 diesel engine connecting rods can well solve the quality problems like poor surface quality of forge pieces, not up to standards thickness, and low precision sized forge pieces during the production of steam-air die forging hammers from aspects of the improvement of technic plan, the optimization of die design and manufacture, and the control of standard operating procedure control. After the productive practice of 2000 pieces, the production technics of steam-air die forging hammers have been explored, summarized and mastered, which finally improves the stability of product quality.