某厂从意大利纳萨蒂引进了6台800吨压砖机;该机属主缸与活动横梁为浮动连接方式。在对过渡球面进行清洗换油时发现4台压砖机连接主缸的螺栓有断裂现象,多则断4个,少则断2个,其中1台过渡球面出现裂纹,致使过渡球面不能使用。现对上述现象分析原因如下,供同行参考。 1.排气方式的影响。由于该机采用了预压橡胶反弹力进行排气;靠人工来调节两边大螺帽的高度进行排气,有时出现两边高度不一致,形成人为一高一低现象,则在压制过程中,使活动横梁可能出现倾斜现象。 2.当压砖机出现前后晃动不稳定时,调节4个带有蝶型弹簧的螺栓出现偏差,使得横梁与主缸接合面左右间隙不一样,在压制过程中产生两 A factory has imported six 800-ton presses from Nasati, Italy; the machine is a floating connection with the master cylinder and the movable beam. When the transition sphere was cleaned and oil changed, it was found that the bolts connecting the four cylinder presses to the master cylinder had a fracture phenomenon, with 4 broken at most, and 2 broken at less, of which 1 had a crack on the transition sphere, which made it impossible to use the transition sphere. The reasons for the above phenomena are analyzed as follows for reference by peers. 1. The effect of the exhaust method. Because the machine uses a pre-compression rubber rebound force for the exhaust; manually adjust the height of the two sides of the big nut to exhaust, sometimes there is inconsistency between the two sides to form a man-made a high and low phenomenon, in the suppression process, so that activities The beam may be tilted. 2. When the press is unstable before and after the emergence of the press, adjust the deviation of the four bolts with the butterfly spring, so that the gap between the crosshead and the master cylinder is not the same as the left and right clearance, and two are generated during the pressing process.