摘要
介绍用自制的快速冻土切削试验台,在不同的温度、含水量、切削速度和切削深度的条件下进行的冻土切削试验,分析了这些外界条件对切削比阻及切削破坏形态的影响。试验结果表明,在含水量中等和较高及温度较低时,冻土的切削主要以刀具撕裂冻土的破坏形式出现,深切削比浅切削省功,刀具磨损小。
A series of experiments for frozen soil cutting under various temperatures,water contents,cutting speeds and depths are conducted by means of a fast-speed frozen soil cutting apparatus developed by the arthors.The effects of these conditions on the specific cutting re- sistance,specific energy and broken pattern of frozen soil are analysed.The results show that the main broken pattern can be described as a process in which the frozen soil is torn away by cutting tools,and that energy consumption as well as tool wear are lower in deep cutting than in shallow cutting.
关键词
冻土
切削强度
比能耗
frozen soil cutting
cutting strength
specific energy
