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一、前言 我国目前尚未生产挤压铸造(液态模锻)专用液压机,通用四柱万能液压机是推广这项新工艺的主要设备。各单位使用情况大致是:①压机未经改动,保持原有结构性能;②压机局部改装,部分适应挤铸工艺要求。显然,前一种情况无法满足挤铸工艺提出的要求,而后者亦无法克服压机固有结构带来的障碍。因此,研制一种适合挤压铸造工艺特点,性能优良,使用方便的挤压铸造专用液压机,便是推广这项先进成形工艺的必不可少的条件。
First, the foreword At present, China has not yet produced the hydraulic press for squeeze casting (liquid forging), universal four-column universal hydraulic press is the main equipment to promote this new technology. The use of each unit is roughly: ① press unmodified to maintain the original structural performance; ② partial modification of the press, part of the extrusion process to meet the requirements. Obviously, the former situation can not meet the requirements of the extrusion casting process, and the latter can not overcome the obstacles caused by the inherent structure of the press. Therefore, the development of a suitable squeeze casting process characteristics, excellent performance, easy to use squeeze casting special hydraulic machine, is to promote this advanced forming process is an indispensable condition.