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一、引言自混凝土挤压机在生产中使用以来,挤压铰刀的耐磨性一直被人们所重视。因为它直接影响到产品质量、挤压机的操作、维修与生产成本,而且关系到挤压机的推广应用。国内在解决挤压绞刀耐磨性上走的路子不同,所用材料不同,而且质量也不稳定,使用寿命由开始的挤压成型几百米,直到现在的4～5千米。为进一步提高使用寿命,我们分析了失效原因,结合国内外在材料抗磨研究方面的新技术,选择了合金白口铸铁作为铰刀的用材,进行了应用性研究。通过小批量工业性考核试验得出的数据,说明铰刀寿命有了大幅度提高。从而为达到低成本、低摊销提供了依据。二、铰刀磨损分析
I. INTRODUCTION Since the use of concrete extruders in production, the wear resistance of extruded reamers has been valued by people. Because it directly affects the product quality, the operation of the extruder, maintenance and production costs, but also related to the promotion and application of the extruder. The way to solve the wear resistance of extruded reamers in China is different. The materials used are different, and the quality is also unstable. The service life starts from the extrusion molding of several hundred meters, until now 4 to 5 kilometers. In order to further improve the service life, we analyzed the cause of failure, combined with new technologies in the field of anti-wear research at home and abroad, selected alloy white cast iron as the material of the reamer, and applied research. The data obtained through small-scale industrial assessment tests shows that the life of the reamer has been greatly improved. This provides the basis for achieving low cost and low amortization. Second, the reamer wear analysis