基于车削路径实现钻杆内螺纹断屑加工
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摘要
在分析钻杆接头内螺纹加工技术及带状车屑形成机理的基础上,提出了改变车削路径实现钻杆接头内螺纹加工过程中自动断屑的方法。该方法是在车削过程中改变车刀的行进路径,进而改变背吃刀量的大小,当背吃刀量为0时,车屑形成条件不足,发生断离。试验采用外直螺纹断屑研究到外锥螺纹断屑研究,最后对内锥螺纹断屑研究循序渐进的流程。现场试验结果表明,三种螺纹车屑均呈C型或长螺旋状,断屑效果良好,质量检测合格,该方法可以实现钻杆接头内螺纹加工过程中自动断屑。
Based on the analysis of the internal thread processing technology of the drill pipe joint and the formation mechanism of the belt scrap,a method of changing the turning path to realize the automatic chip breaking during the internal thread processing of the drill pipe joint is proposed. The method is to change the traveling path of the turning tool during the turning process,thereby changing the amount of the backing knife. When the backing knife amount is 0,the cutting debris forming conditions are insufficient and the breaking occurs. The test uses the outer straight thread breaking chip to study the outer taper thread breaking chip,and finally studies the step-by-step process of the inner taper thread breaking chip. The field test results show that the three threaded scraps are C-shaped or long spiral,the chip breaking effect is good,and the quality inspection is qualified. This method can realize automatic chip breaking during the internal thread processing of the drill pipe joint.
Based on the analysis of the internal thread processing technology of the drill pipe joint and the formation mechanism of the belt scrap,a method of changing the turning path to realize the automatic chip breaking during the internal thread processing of the drill pipe joint is proposed. The method is to change the traveling path of the turning tool during the turning process,thereby changing the amount of the backing knife. When the backing knife amount is 0,the cutting debris forming conditions are insufficient and the breaking occurs. The test uses the outer straight thread breaking chip to study the outer taper thread breaking chip,and finally studies the step-by-step process of the inner taper thread breaking chip. The field test results show that the three threaded scraps are C-shaped or long spiral,the chip breaking effect is good,and the quality inspection is qualified. This method can realize automatic chip breaking during the internal thread processing of the drill pipe joint.
引文
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[2]任元.断屑槽刀具车削仿真及试验研究[D].大连:大连理工大学,2016.
[3]缪宏.基于冷挤压的高强度钢内螺纹抗疲劳加工工艺研究[D].南京:南京航空航天大学,2011.
[4]张青生.难切削材料数控加工自动断屑方法[J].装备制造技术,2017(6):65-66,84.
[5]王晓霞,王洪祥,李明洪.超精密车削时切屑形成及表面微观形貌形成机理的研究[J].工具技术,2001,35(9):14-16.
[6]He G H,Liu X L,Yan F G,et al. Research on the fracture and break-age of heavy-duty turning tool for rough machining hydrogenated cylin-drical shell[J]. Solid State Phenomena,2011,175(175),305-310.