分析台车体原工艺方案产生缺陷的原因，对工艺进行了改进，并重新设计了工装，消除了裂纹和变形缺陷，延长了工装使用寿命。
The article analyzes the cause of producing defects with original procedures and put forth an improved procedure and new-designed fixtures to eliminate cracks and deformation defects.
最后提出了“破坏环境”的概念，指出台车架的塑性变形是在破坏环境下发生的。
A concept of "damaging circumstances" is put forward and it is considered that such damaging circumstances are just the causes of the plastic deformation of the frame.
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