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锻锤砧块下垫木按苏联《动力机械基础设计规范》(CH18—58)及我国一机部《动力机器基础设计规范》(草案),系水平放置,木材横纹受压。由于木材横纹受压强度很低,在长期冲击外力作用下,极易出现永久变形,使用寿命仅一年左右。据观察,发现垫木内部应力分布是不均匀的,垫木的上表面与砧子底面接触的10～20毫米厚度内均出现压缩变形,而内
Forging hammer anvil underwood according to the Soviet Union, “Power Machinery Basic Design Code” (CH18-58) and a unit of our country, “Power Machinery Basic Design Code” (Draft), Department of horizontal placement, wood stripes compression. Due to the low compressive strength of the wood stripes, under the long-term impact external force, it is easy to appear permanent deformation, the service life is only about one year. According to the observation, it was found that the internal stress distribution of the mat was uneven. The upper surface of the mat was compressed and deformed within the thickness of 10 to 20 mm which was in contact with the underside of the anvil,