电子万能试验机横梁优化设计

Optimization Design of Transverse Beam of Electronic Universal Testing Machine

电子万能试验机主机框架中,3道横梁占主机的主要重量与成本,大多试验机厂商采用实心厚铁板或铸铁件制作横梁,这两种方式各有利弊。本文针对100kN电子万能试验机横梁进行优化设计,采用Q235A铁板组合焊接制作横梁,经过优化设计和有限元分析,优化得到的新横梁较现有横梁有效减重且力学性能合理,较现有主机重量下降约19.67%,节省成本的同时,整机系统刚度提升约5.3%。

In the main frame of electronic universal testing machine,the three transverse beams account for the main weight and cost of the main machine.Most testing machine manufacturers utilize solid thick iron plate or cast iron to make the transverse beams,and the two methods have their own advantages and disadvantages.In the paper,the transverse beams of a 100kN electronic universal testing machine are optimized,and a fabrication method involving the combination welding of Q235A iron plates is used to make the beams.After optimization design and finite element analysis,the optimized new transverse beam is more effective in weight reduction and reasonable in mechanical properties than the existing beam.Compared with the existing main frame,the weight is reduced by about 19.67%,the cost is saved,and the stiffness of the whole system is increased by about 5.3%.