摘要
在数控机床上通常采用立式加工的方式完成变截面涡旋盘涡旋齿面的铣削加工。为了提高涡旋齿面的加工精度,采用等分展角渐进式变步长双圆弧插补算法,基于几何条件推导出双圆弧公切点的数学模型和误差判别模型。采用该方法对3段基圆渐开组合型线进行插补处理并开展铣削试验验证了算法的可行性。结果表明:插补处理的最大误差为2. 7μm,加工的涡旋齿轮廓度最大为6. 8μm,达到了加工精度要求,实现了高速高效数控加工。
The milling processing of variable cross-section scroll plate’s scroll tooth surface can be usually machined in CNC machine. For purpose of improving the machining precision of the scroll tooth surface,the equal generating angle and gradual variable step double circular interpolation algorithm was adopted,including having geometric conditions based to derive the mathematical model of biarc tangent point and the interpolation error model. Applying this method to interpolate the combination of three segment base circle involute and implementing the milling test to verify the feasibility of the algorithm demonstrate that,the tooth profile precision can meet requirements with a 2. 7μm maximum error in the interpolation processing and a 6. 8μm maximum profile tolerance. This can provide firm basis for high-speed and efficient NC machining.
作者
孙永吉
刘涛
唐林虎
张红梅
王栋梁
SUN Yong-ji;LIU Tao;TANG Lin-hu;ZHANG Hong-mei;WANG Dong-liang(College of Mechanical and Electronic Engineering,Lanzhou University of Technology;Training Center,Lanzhou Institute of Technology)
出处
《化工机械》
CAS
2019年第1期35-40,共6页
Chemical Engineering & Machinery
基金
国家自然科学基金项目(51665035)
甘肃省高等学校科研项目(2016B-112)
兰州工业学院启智人才计划项目(2018-1)
关键词
压缩机
立式铣削
涡旋齿
变步长
双圆弧插补
加工精度
compressor
end milling
scroll tooth
variable step
double circular interpolation
machining precision
