武汉重型机床厂对精化改造大型设备比较重视，也取得了比较好的经济效果。本文介绍的该厂对重型龙门铣刨联合机床的精化改造就是一个实际的例证。该厂结合本厂现有条件对老的重型设备从电气传动、机械传动和部分机械结构进行了精化改造，使该重型机床的精度大大提高，较好地完成了产品上水平的任务。他们的经验值得各厂借鉴。本刊希望各厂都来总结与交流这方面的经验。 Heavy Machine Tool Plant in Wuhan on the transformation of large equipment more attention, but also achieved good economic results. This article describes the refinement of the heavy duty gantry milling machine combined machine is a practical example. The factory with the existing conditions of the old heavy equipment from the electric drive, mechanical transmission and part of the mechanical structure of the refined transformation, the heavy machine greatly improve the accuracy of the product to better completion of the task of the level. Their experience is worth learning from each factory. The magazine hopes to summarize and exchange experience in this area.