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为了研发出能够和现场某型挖掘机斗齿座配套的新型复合材料斗齿,在缺乏原设计图纸的情况下,首要的问题是获知和铲斗铲齿相配的斗齿内腔形状和尺寸以及销孔位置等关键设计尺寸。鉴于斗齿的外形和内腔形状复杂,难以用常规测量器具准确测得有配合要求型面的形状和尺寸,为此确定了基于实物逆向工程(RE)的技术路线,来获得具有足够反求精度的斗齿CAD模型及配合尺寸。就各反求环节的策略和要点作了扼要说明。依据反求三维实体模型生成的工程图样采用消失模铸造工艺试制的斗齿,经过现场的试装和试用,取得了一次性成功,说明所采用的技术路线和模型重建方法实用、有效。
In order to develop a new type of composite tooth that can be matched with a bucket excavator of a certain excavator on site, in the absence of original design drawings, the primary problem is to know the shape and size of the bucket cavity that matches the bucket shovel and Pin hole location and other key design dimensions. In view of the complicated tooth shape and cavity shape, it is difficult to accurately measure the shape and size of the mating surface with conventional measuring instruments. Therefore, the technical route based on physical reverse engineering (RE) is determined to obtain a sufficient reverse Accuracy of the tooth CAD model and with the size. On the reverse aspects of the strategy and points made a brief description. According to the engineering drawings generated by inverse three-dimensional solid model, the tooth made by the lost foam casting process was tested successfully and successfully. It shows that the adopted technical route and model reconstruction method are practical and effective.