The cutting burr is one of the common phenomena occurring in metal cutting.In this paper,the forming processes,main effect factors and change law of the cutting direction burr in orthogonal cutting have been studied a...The cutting burr is one of the common phenomena occurring in metal cutting.In this paper,the forming processes,main effect factors and change law of the cutting direction burr in orthogonal cutting have been studied and related theories are analyzed based on the cutting experiments.The result shows that:(1)the forming processes of cutting direction burr consist of normal cutting,flexure deformation of end surface of workpiece,plastic effect,continuous cutting and shear break separating in orthogonal cutting;(2)a new phenomenon is found that cutting direction burr is formed with the shear break separation of the chip and workpiece machined surfaces;(3)the size of cutting direction burr varies with workpiece materials,cutting parameters and geometric parameters of the cutting tool.展开更多
目的：探讨宫腔镜微型剪刀分离手术治疗宫腔粘连的临床效果，并与宫腔镜电切分离手术效果相比较。方法将103例宫腔粘连患者随机分为观察组52例和对照组51例，观察组采用宫腔镜微型剪刀切除术，对照组行宫腔镜电切分离术，比较两组手术...目的：探讨宫腔镜微型剪刀分离手术治疗宫腔粘连的临床效果，并与宫腔镜电切分离手术效果相比较。方法将103例宫腔粘连患者随机分为观察组52例和对照组51例，观察组采用宫腔镜微型剪刀切除术，对照组行宫腔镜电切分离术，比较两组手术时间、术中出血量、术中并发症情况，术后1、3个月宫腔再粘连发生率以及临床疗效。结果两组手术时间、术中出血量及并发症等比较差异未见统计学意义（P ＞0.05）；观察组术后1、3个月宫腔再粘连发生率为26.9％、13.5％，对照组为29.4％、17.6％，组间比较差异未见统计学意义（P ＞0.05）；术后3个月复查，观察组总有效率为90.4％，对照组为92.2％，组间比较差异未见统计学意义（ P ＞0.05）。结论宫腔镜微型剪刀分离手术治疗宫腔粘临床效果与宫腔镜电切分离手术相似，宫腔镜剪刀分离术临床应用简便，可门诊完成，适于基层医院推广应用。展开更多
基金Supported by National Natural Science Foundation of China (No.59775071).
文摘The cutting burr is one of the common phenomena occurring in metal cutting.In this paper,the forming processes,main effect factors and change law of the cutting direction burr in orthogonal cutting have been studied and related theories are analyzed based on the cutting experiments.The result shows that:(1)the forming processes of cutting direction burr consist of normal cutting,flexure deformation of end surface of workpiece,plastic effect,continuous cutting and shear break separating in orthogonal cutting;(2)a new phenomenon is found that cutting direction burr is formed with the shear break separation of the chip and workpiece machined surfaces;(3)the size of cutting direction burr varies with workpiece materials,cutting parameters and geometric parameters of the cutting tool.
文摘目的：探讨宫腔镜微型剪刀分离手术治疗宫腔粘连的临床效果，并与宫腔镜电切分离手术效果相比较。方法将103例宫腔粘连患者随机分为观察组52例和对照组51例，观察组采用宫腔镜微型剪刀切除术，对照组行宫腔镜电切分离术，比较两组手术时间、术中出血量、术中并发症情况，术后1、3个月宫腔再粘连发生率以及临床疗效。结果两组手术时间、术中出血量及并发症等比较差异未见统计学意义（P ＞0.05）；观察组术后1、3个月宫腔再粘连发生率为26.9％、13.5％，对照组为29.4％、17.6％，组间比较差异未见统计学意义（P ＞0.05）；术后3个月复查，观察组总有效率为90.4％，对照组为92.2％，组间比较差异未见统计学意义（ P ＞0.05）。结论宫腔镜微型剪刀分离手术治疗宫腔粘临床效果与宫腔镜电切分离手术相似，宫腔镜剪刀分离术临床应用简便，可门诊完成，适于基层医院推广应用。
