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一概述我国东北地区的林区木材采伐,大都在冬季进行,从本年10月至次年4月近6个月。在12月～1月最冷时期,采伐区温度平均为-25～-30℃。黑龙省富裕林机厂是我国锯链生产的主要厂家之一。产量约占全国年需要量的三分之一。东北林区使用的国产锯链60%以上是该厂产品。 1984年,由林业部组织的调查表明:由于受低温、磨损、振动、冲击等多种因素影响,国产锯链平均使用寿命为155m~2(锯切面积)左右,大部分达不到国家标准锯切面积为200m~2的要求。锯链失效主要表现为在链片部件的断裂,锯链在工作8小
An overview of the timber in northeast China’s timber harvesting, mostly in the winter, from October this year to April next year, nearly 6 months. In the coldest period from December to January, the average temperature in the cutting area was -25 ~ -30 ℃. Heilongjiang Province, Fuyu Lin Machinery Factory is one of the major manufacturers saw chain production. The output accounts for about one third of the national annual requirement. More than 60% of the domestic saw chains used in the Northeast Forest are the products of the factory. In 1984, the survey conducted by the Ministry of Forestry showed that the average service life of domestic saw chains was about 155m ~ 2 (sawing area) due to many factors such as low temperature, abrasion, vibration and impact, and most of them failed to reach the national standard Cutting area of 200m ~ 2 requirements. Saw chain failure is mainly manifested in the chain pieces of the fracture, the saw chain at work 8 small