我厂650开坯车间担负着轧材车间的开坯任务,因轧机压上机构经常“卡死”,长期影响生产上总量,质量上水平。该压上机构的工作环境十分恶劣,长期受到水和氧化铁皮的浸蚀,当水和细氧化铁皮进入压上螺杆和铜螺母的螺纹间隙时,就导致压上螺杆卡死无法调整。由于该机构位于轧机牌坊底部,拆开清洗困难,轧制过程中只能用加垫片来调整轧辊高度,既增加了工人的劳动强度,又影响产量和质量。原调整机构卡死的原因有（利用改进后压上机构简图进行分析）: Our factory 650 Billet Workshop is responsible for the billet work of the rolling stock shop. Because of the frequent “stuck” of the rolling mill pressing mechanism, the total amount of production and quality on a long-term basis are affected. The pressure on the working mechanism of the organization is very harsh, long-term water and oxide scale erosion, when the water and fine iron oxide into the screw on the screw and copper nut thread gap, resulting in pressure on the screw stuck can not be adjusted. As the mill is located at the bottom of the mill, open the cleaning difficulties, the rolling process can only be used to adjust the roll height pad, not only increasing the labor intensity of workers, but also affect the yield and quality. The reasons for the original adjustment mechanism stuck (using improved pressure on the organization diagram for analysis):