车床改装拉床的液压控制系统和主框架的结构稳定性

Design Hydraulic Control System and Main Frame of Broaching Machine Refitted with Old Long Lathe

利用旧车床改装成LJ8510/CGL型键槽拉床,符合绿色制造减小回收成本的要求。采用通用液压元件组成节能型液压控制系统,提高了机床的自动化程度,设计的框架结构承受由主油缸拉动拉刀形成的沿水平轴线方向的拉削力,利用钢结构原理对机床的主框架结构进行整体稳定性计算,针对受力时可能出现单肢先行破坏的情况,分别对弯矩作用于截面的主轴平面内和平面外的稳定性进行计算。改装后的机床液压控制系统拉削工作需要,试车运转正常,连续4h运行,系统油温升高<20℃;整机质量达到国标要求,其设计和分析方法值得推荐。

An old long lathe is changed to LJ8510/CGL type keyway broaching machine. It accords to green manufacture requirement and reduces retrieved costing. With general hydraulic pressure elements, energy saving hydraulic control system is composed and automation of machine tool has been advanced. Designed frame bears pulling and cutting forces in the direction of level axes due to pulling tool drove by hydraulic oil. The structural stability of the main frame was calculated and analyzed based on the principle of steel structure. In the light of probable previous invalidation of single arm as it is loaded, its stability was calculated when the bending moment operated inside and outside the main axis plane. The refitted hydraulic control system met pulling and cutting requirements of the system. And run-in operated normally and continuously for 4 hours with the rise of oil temperature being lower than 20°C. The quality of this system has achieved ISO level and the method of design and analysis is worthy to spread.