粗轧入口推床液电系统的改造

Revamp on hydraulic-electric pushing lathe at the entry of roughing mill

武钢1 580mm生产线粗轧R2入口推床在日常生产过程中出现多次油缸底层基础松动、地脚螺栓断裂的情况,造成设备损坏频繁,严重影响正常的生产和产品质量。虽做了几次修复加固,但仍无法彻底解决基础松动螺栓损坏的问题。为了彻底消除隐患,保证正常生产,针对粗轧R2入口推床基础螺栓断裂的问题,从根源入手分析查找原因,分别对油缸基础强度进行校核,液压系统进行综合分析以及电气控制程序进行全面分析优化,最终查找出问题根源,彻底解决了推床基础的问题,有效确保了R2入口推床的使用可靠性,保证了轧制节奏和稳定性,效果十分理想。

Defects such as looseness of foundation of the oil cylinder bottom and fracture of the foundation bolt frequently occur in the pushing lathe located at the R2 entry of the roughing line of 1 580 mm rolling mill in the daily production and thus accidents of the equipment damage take place repeatedly and the normal production and product quality are seriously affected.The problems of foundation looseness and bolt fracture could not be thoroughly solved even though repair and stiffening work ever conducted for a few times.In order to solve the hidden trouble completely and ensure the daily production properly,in light of the problem of the bolt fracture at the R2 entry of the roughing mill the strength of the oil cylinder bottom foundation was calibrated and the hydraulic system was comprehensively analyzed and the electrical control program fully checked and optimized and in the end the origin of the trouble was found out and the problems of foundation of the pushing lathe was thoroughly solved.The reliability of the usage of the pushing lathe at the R2 entry of the roughing mill and the tempo and stability of rolling can be ensured and the results are quite satisfactory since revamp.