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.
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。
When the negotiation calculation is made for the D45 well car, it is necessary to consider the side displacement effect of the car body center plate support caused by the guiding device.
在进行D45型落下孔车曲线通过计算时，又需要考虑导向装置引起的车体心盘支撑的侧移效应。
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.
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。
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