According to the fault types and characteristics of vacuum system of large aluminium vacuumbrazingfurnace, main problems of the existent fault diagnosis of vacuum system are analyzed.
根据大型真空钎焊炉真空系统的故障种类及特点，分析了现有的真空系统故障诊断存在的主要问题。
3
The brazing experiment is finished in vacuumfurnace, the brazed joints with different filler metal thickness are obtained by different pressure on them.