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提出了一种截齿刀头和刀体之间的热固联接机理。分析得出了热固后截齿的刀头受外载不产生脱落、刀体孔受内压应处于弹塑性状态和不发生微观裂纹扩展的校核准则，确定了热固时过盈量的计算公式
A thermomechanical coupling mechanism between cutter bit and cutter body was proposed. It is concluded that the cutter head of pick after thermosetting does not come off by external load, the checking criterion that the inner diameter of cutter body should be in elastic-plastic state and microcrack expansion does not occur, Calculation formula