锻压技术

超宽盾构刀盘方板锻造成形技术与生产试制

英文标题：Research and trial production on forging technology for ultra-wide shield cutter head square plate

作者：胡振志1 2 汪雨昌1 2 徐航涛1 2 肜亮1 2 陈朝阳1 2 刘旺1 2 郭卫东1 2

分类号：TG316

出版年,卷(期):页码：2023,48(12):1-8

摘要：

5750 mm×5750 mm×380 mm超宽盾构刀盘方板锻件的宽度大、高度低、吨位重，技术指标严格，在钢锭纯净度控制、锻造方案选定和热处理工艺制定方面难度极大。在钢水冶炼控制方面，提出采用“优选钢板料+真空脱气+真空浇注”工艺方案。在展宽拔长方面，首次提出“控尺制坯+旋转进砧拔长展宽+四面平整”的锻造成形方案。在热处理工序，结合材质特性和零件结构，提出“正火阶段均匀喷雾强制冷却+控制支垫高度+控时翻转”的工艺措施。此外，通过建立有限元分析模型，进行锻造成形多方案模拟比对分析，预测和验证各种成形方案下心部承受压应力和锻透压实效果，为工艺方案和参数制定提供了理论依据，通过生产试制验证了工艺方案的合理性。

The 5750 mm×5750 mm×380 mm ultra-wide shield cutter head square plate forgings have large width, low height, heavy tonnage and strict technical indicators, and it is extremely difficult to control the purity of steel ingot，select the forging scheme and formulate the heat treatment process. Therefore, in the aspect of melten steel smelting，the process scheme of “ preferred steel plate + vacuum degassing + vacuum pouring ” was proposed. In the aspect of lengthening and drawing，the forging forming scheme of “dimension control for blank making + drawing and speading with rotary anvil + four-sided trimming” was put forward for the first time. In the heat treatment process，combined with material characteristics and part structure，the process measures of “uniform spray for forced cooling in normalizing stage + support pad height control + time-controlled flipping” was put forward. Furthermore, by establishing a finite element analysis model, the multi-scheme simulation comparison analysis for forging was conducted, and the compressive stress at the core and the forging compaction effect of various forming schemes were predicted and verified, which provides the theoretical basis for the formulation of process scheme and parameters. Through the trial production, the rationality of the process scheme is verified.

基金项目：

洛阳市重大科技创新专项（2301020A）

作者简介：胡振志（1981-），男，硕士，高级工程师 E-mail：zhenzhi401@163.com

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