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由哈尔滨工业大学锻压教研室负责,沈阳风动工具厂,青岛即墨铸锻厂,山东大学参加的“六五”国家科技攻关课题《凿岩机缸体液态模锻工艺研究》,经过三年多努力,于1986年5月16日在哈尔滨通过国家鉴定。来自国内液态模锻,锻造、和铸造专业的专家二十余人参加了鉴定会。与会代表观看了现场工艺录象,听取了课题组提出的工作报告,技术总结和查新报告,对技术文件,工艺过程和制件质量进行了全面审查,一
Harbin Institute of Technology, responsible for forging teaching, Shenyang Fengdonggongju Chang, Qingdao Jimo Forging Factory, Shandong University participated in the “Six Five” national scientific and technological project “Drill cylinder liquid forging technology research”, after three years of hard work in the May 16, 1986 in Harbin through the national appraisal. From the domestic liquid forging, forging, casting and casting more than twenty experts attended the appraisal meeting. The delegates watched the live process video, listened to the work report, technical summary and new search report proposed by the research group, conducted a comprehensive review on technical documents, technological processes and parts quality