步进梁端部滑块脱落原因分析及改进措施

Analysis of the Reasons for the Sliding Block at the End of the Walking Beam Falling off and Improvement Measures

分析了步进梁端部滑块脱落的原因,主要是操作失误、钢坯跑偏、钢坯定位不准及安装方式不当造成的。操作失误主要是步进梁未下降到位就开启出料悬臂辊道,钢坯与滑块之间发生摩擦而导致滑块脱落;已经出炉的钢坯需要倒回炉内时,步进梁未下降到位,钢坯就会碰撞滑块导致滑块脱落;钢坯步距不当,钢坯最后一步上辊道时,钢坯一部分压在滑块上,一部分悬空,滑块受力不均而导致脱落;钢坯烧弯,一头或两头弯曲度过大,导致钢坯上辊道时碰掉滑块。钢坯跑偏主要是钢坯在入炉的时候发生偏移导致钢坯与出料辊道中心线不平行,钢坯两端不能同时到达悬臂辊道而导致滑块脱落。钢坯定位不准主要是编码器失灵或手动装钢的时候钢坯定位错误导致滑块脱落。安装方式不当是步进梁端部滑块焊接在步进梁上,焊接面积小,固定强度不够,当滑块受到摩擦或碰撞时脱落。针对这些问题提出了改进措施,通过提高操作水平、加装防偏装置、确保钢坯准确定位及改进安装方式解决。操作上,确认步进梁下降到位悬臂辊道才能运转;精确计算步距;及时控制炉温防止钢坯烧弯;防偏装置方面,在入炉口加装防偏挡板;定期校准钢坯定位;安装方式上,将步进梁端部滑块设计为“回”字形结构。这些措施,解决了滑块脱落问题,从而减少了停炉检修时间,提高了经济效益。

The reasons for the sliding block falling off at the end of the walking beam are analyzed, which are mainly caused by operation errors, billet deviation, inaccurate positioning of steel billets and improper installation methods. The main operation errors are that the cantilever roller tables are opened before the walking beams are lowered into place, and the friction between the billet and the slide block causes the sliding block to fall off;When the out-of-furnace billet needs to be put back into the furnace, the walking beams are not lowered into place, and the billet will collide with the sliding block and cause the sliding block to fall off;When the billet steps on the roller table at the last step, the billet is partly pressed on the sliding block and partly suspended, causing the sliding block to fall off due to uneven force;When the steel billet is burned and bent, one or both ends are bent too much, causing the sliding block to fall off when the steel billet is placed on the roller conveyor.The deviation of the billet is mainly caused by the deviation of the billet when entering the furnace, which causes the center line of the billet and the discharging roller table to be non-parallel, and the two ends of the billet cannot reach the cantilever roller table at the same time, causing the slider to fall off. Inaccurate positioning of steel billets is mainly due to encoder failure or incorrect positioning of steel billets during manual loading, resulting in the sliding block falling off. Improper installation is the sliding block at the end of the walking beam welding on the walking beam, welding area is small, the fixed strength is not enough, the sliding block falls off when it is rubbed or collided. In view of these problems, the improvement measures are put forward, which can be solved by improving the operation level, installing anti-deviation device, ensuring accurate positioning of steel billets and improving the installation method.In operation, make sure that the walking beam is lowered into place before the cantilever roller table can operate;Calculate step distance accurately;Timely control the furnace temperature to prevent bending of steel billets. As for the anti-deviation device, an anti-deviation baffle is installed at the furnace entrance. Regularly calibrate the positioning of steel billets.In terms of installation method, the sliding block at the end of the walking beam is designed as a“回” shape structure. These measures solve the problem of slider falling off, thereby reducing furnace shutdown time and improving economic benefits.