从分析上心盘的成形过程出发，介绍了上心盘热模压成形工艺及模具特点。
The forming technology oft he upper body center plate in hot die forging and the characteristic of the die structure have been introduced with the analysis on the forming process.
分析了一体式后从板座及上心盘座裂纹、夹砂等缺陷产生的原因，并介绍了工艺改进措施。
The causes to such defects as cracking and sand inclusion in the integral rear draft lug and the body center plate filler are analyzed, and the technology improvement measures are described.
对铁路用上心盘热模压成形过程进行了数值模拟分析，得到了上心盘成形过程的应力场、应变场。
The numerical simulation of hot die forming process for upper core plate stock in railway was done.
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