發(fā)布時間：2019-01-22 14:59

【摘要】：對使用1 1/4-7UNC成組等徑直槽絲錐加工高硬金屬材料時會出現(xiàn)攻絲扭矩大,易扭斷并且加工螺紋精度低等問題.為解決這一工藝難題,在對成組絲錐攻絲受力與扭矩分析的基礎(chǔ)上,決定對其進行不等徑設(shè)計.以減小攻絲扭矩和提高加工螺紋精度為目標(biāo),對其幾何參數(shù)進行了優(yōu)化設(shè)計.建立兩組絲錐三維實體模型,然后進行有限元分析.將兩組絲錐分析出來的結(jié)果進行對比,可以看出優(yōu)化后成組不等徑直槽絲錐結(jié)構(gòu)合理.并且加工出來的螺紋表面質(zhì)量,精度和使用壽命均有所提高.
[Abstract]:The problems such as high tapping torque, easy breaking and low precision of thread processing will occur when using 1 1/4-7UNC equal straight groove taps to process high hard metal materials. In order to solve this technical problem, based on the analysis of tapping force and torque of group tap, it is decided to design unequal diameter of tap. In order to reduce tapping torque and improve the precision of thread machining, the geometric parameters are optimized. Two groups of three-dimensional solid models of taps were established, and then finite element analysis was carried out. By comparing the results of the two groups of taps, it can be seen that the structure of the optimized taps with unequal straight grooves is reasonable. The surface quality, precision and service life of the threaded thread are improved.
【作者單位】： 大連交通大學(xué)機械工程學(xué)院;
【分類號】：TG722

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